Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

2nd Quarter > Physiology Test 1 > Flashcards

Physiology Test 1 Flashcards

0
Q

What are two types of cell death?

A
  1. Apoptosis

2. Cell necrosis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
1
Q

How many cells in the human body?

A

75 - 100 trillion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is apoptosis?

A

Programmed cell death(planned), occurs all the time, naturally(i.e. webs between our fingers before birth)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is cell necrosis?

A

Unplanned abnormal death of the cell, occurs from lack of blood supply and oxygen for example ischemia and necrosis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the major organization of a cell?

A

Nucleus and the cytoplasm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What cells are not reproduced?

A

Neurons,They are not replaced.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is water used for in the cell?

A

Medium for substances to be dissolved or suspended and for chemical reactions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is water used for in the cell?

A

Medium for substances to be dissolved or suspended and for chemical reactions, water must be kept in a very narrow range as if not it can cause cell death

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What two types of proteins are found in cells?

A
  1. Structural

2. Globular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are the two types of intracellur electrolytes?

A
  1. Cations:(+ charge) POTASSIUM is a monovalent(meaning it carries 1 positive charge) it is the most abundant intracellular cation. Magnesium, calcium, sodium, if too much calcium accumulates in the cell it can cause cell death, low levels of calcium and sodium inside the cell
  2. Anions:(- charge) inorganate phosphate is the most abundant intracellular anion, bicarbonate, chloride, sulfate
    these 3 usually monovalent
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are three types of lipids found in the cell?

A
  1. Phospholipids
  2. Cholesterol
  3. Triglycerides
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The plasma membrane is also known as what?

A

The cell membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are two forms of carbohydrates in the cells?

A
  1. Glucose-neuron likes to use glucose for their energy source
  2. Glycogen- storage form of glucose(major source of stored glycogen is in the hepatacytes of the liver)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What type of membrane is the cell membrane?

A

a phospholipid bilayer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the description of the “head” of the phospholipid bilayer of the cell membrane(3)?

A
  1. Its polar, meaning it has negative and positive charged areas(nitrogen, organic phosphorus)
  2. its hydrophilic, meaning it has a strong affinity for water
  3. it contains organic phosphate(its not an electrolyte)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the description of the “tails” of the phospholipid bilayer of the cell membrane?

A
  1. two tails, containing fatty acids(carbon, hydrogen), they are lipid tails
  2. non polar, meaning it has equally distributed charges not accumulated in one pole or the other
  3. its hydrophobic, meaning it has no affinity with water
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are peripheral proteins?

A

proteins that don’t transverse the entire cell membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What are intrinsic(integral) proteins?

A

proteins that transverse the entire cell membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What are the two types of proteins in the cell membrane?

A
  1. Intrinsic proteins

2. peripheral proteins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

A cell function is dependent upon what?

A

The type, function or number of specific organelles within the cell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What are the levels of physiology?

A
  1. Human Organism
  2. Systems
  3. Organs
  4. Tissues
  5. Cells
  6. Organelles
  7. Proteins, lipids, carbs and or combinations
  8. Molecules
  9. Atoms
  10. Electrons, Protons, Neutrons
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Humans are indivisible inseparable within four parts, what are they? What affects one of them affects them all.

A

Body
Mind
Spirit
Time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

The cell membrane separates what?

A

The intracellular compartment from the extracellular compartment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Collectively the part of the cell between the cell membrane and the nuclear membrane is called?

A

Cytoplasm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

The substances as a unit that make up a cell is called the?

A

Protoplasm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What is the function of structural proteins?

A

They provide structure and support for the cell, for example the cytoskeleton

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

What are two examples of globular proteins?

A
  1. enzymes

2. some transport proteins that are a part of the cell membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What some examples of fluids found extracellular?

A 
Interstitial fluid
CNS fluid
pleural fluid
Synovial fluid
Intervascular fluid
Pericardial fluid
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What is a phospholipid bilayer?

A

cells that form the cell membrane in two layers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Organelles within the cell are surrounded by?

A

unilayer or bilayer phospholipids, separates the organelle from the rest of the cytoplasm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

What are functions of the Intrinsic proteins(5)?

A
  1. Protein channels allowing passage in and out of cell
  2. Transport proteins in and out of the cell(binding sites)
  3. Cell membrane-bound receptors
  4. Cell markers
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

What are the functions/characteristics of peripheral proteins(3)?

A
  1. either point toward inside or outside
  2. enzymes
  3. often attached to and regulate intrinsic proteins or carry out messages as directed by intrinsic proteins
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

What are glycoproteins?

A

Carbohydrate chains that extend out of the cell membrane are attached to a protein

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

What are glycolipids?

A

Carbohydrate chains that extend out of the cell membrane and are attached to a fatty acid tail(lipid)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

What is the glycocalyx

A

formed on the outside of the cell made up of glycoproteins and glycolipids that provide and outer support structure. Often the glycocalyx between cells are attached, causing the cells to be attached together

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

What is a ligund?

A

A chemical signal that may or may not be able to bind to the receptor site on the receptor protein of a cell. Hormones use this procedure…matching ligund to the receptor site

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

What is a cell surface marker?

A

A glycoprotein or glycolipid useful in allowing the immune system identifying normal cells from foreign cells, when WBC identify good cells they let them pass, when they see a bacterial, cancer of fungi(for example) they attack them

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

What separates the nucleus form the rest of the cell?

A

the nuclear envelope

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

What type of membrane makes up the nuclear envelope?

A

two separate phospholipid bilayer membranes with a matrix(space) between the two membranes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

What is the endoplasmic reticulum?

A

it is where the nuclear envelope/nuclear membrane extends out into the cytoplasm of the cell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

Is there a membrane around the nucleolus?

A

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

What is the cytoplasm of the nucleus called?

A

nucleoplasm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

Where is DNA(genes/chromosomes) found? Confined too?

A

nucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

What types of cells have a large Golgi apparatus?

A

Cells involved in secretions, it is most prominent on the side of the cell that the secretions occur

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

Which part of the endoplasmic reticulum has ribosomes attache to it, the rough endoplasmic reticulum or the smooth endoplasmic reticulum?

A

Rough Endoplasmic Reticulum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

Where is the site of protein synthesis?

A

the ribosomes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

What are ribosomes made of?

A

Proteins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

Where do the proteins come from that are used to make ribosomes?

A

they are synthesized by other ribosomes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

Proteins in the nucleus are organized into what two types of units?

A
  1. Large Ribosomal Subunits

2. Small Ribosomal Subunits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

While these large and small ribosomal subunits are being formed what substance is being incorporated into them?

A

ribosomal ribo nucleic acid(rRNA)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

In what structures is rRNA found?

A

ribosomal subunits both large and small

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

What is the function of rRNA?

A

directs overall ribosomal synthesis of any protein

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
52
Q

What is the size of large ribosomal subunits, small ribosomal subunits and complete ribosomes?

A

LRSU-60s
SRSU-40s
CR-80s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

Why is the size of ribosomes important to us?

A

antibiotics directed to kill bacteria and will not target human ribosome

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
54
Q

What are proteins synthesized from?

A

ribosomes in the cytoplasm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
55
Q

What does DNA(genes) strands code for the synthesis of?

A

proteins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
56
Q

Where does the code come from to the ribosome for each individual protein?

A

The nucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
57
Q

How does this code reach the ribosome?

A

a messenger, mRNA strand

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
58
Q

What does transcription refer to as related to protein production?

A

When a specific strand of DNA which has been coded for a specific protein it is transcribed on a mRNA or a messenger RNA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
59
Q

What is carried by the mRNA?

A

Code for the synthesis of a specific protein

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
60
Q

How does the mRNA reach a ribosome in the cytoplasm from the nuclear plasm?

A

through a pore in the nucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
61
Q

What is in the ribosome that is necessary for protein synthesis once the mRNA delivers the specific code from the nucleus?

A

rRNA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
62
Q

What is the differences between rRNA and mRNA?

A

rRNA directs overall ribosomal synthesis of any protein, while mRNA Code for the synthesis of a specific protein

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
63
Q

What are proteins synthesized from?

A

amino acids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
64
Q

What is the function of tRNA?

A

the function of tRNA is to carry the amino acid to the ribosome and binds new amino acid to the growing chainof amino acid…(for protein making)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
65
Q

Briefly explain what happens in protein synthesis as related to DNA, mRNA, rRNA and tRNA

A

mRNA carries the message from the DNA to the ribosomes (which is made partly of rRNA). At the ribsomes the tRNAs bring amino acids where they are strung together to make a protein. The peptide bond between amino acids is made by the rRNA in the ribosome.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
66
Q

Where does protein synthesis occur?

A

Inside the rough endoplasmic reticulum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
67
Q

Once the protein molecule is formed in the RER, where is it sent next?

A

The Golgi Apparatus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
68
Q

Once the modified protein leaves the Golgi Apparatus what carries them?

A

Vesicles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
69
Q

What are three possible destinations and examples of modified proteins once they leave the Golgi apparatus in the vesicles.

A
  1. Modified protein stays inside the vesicle within the cell and becomes a lysosome
  2. Modified protein within the vesicle leaves the cell by exocytosis into the extracellular fluid and becomes a hormone or neurotransmitter for example
  3. Modified protein within the vesicle is incorporated into the cell membrane as an intrinsic protein or a peripheral protein
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
70
Q

What is the function of the free ribosomes?

A

usually make proteins that will function within the cell, while bound ribosomes usually make proteins that are exported from the cell or included in the cell’s membranes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
71
Q

What occurs within the Smooth Endoplasmic Reticulum(3)?

A
  1. Glycogenesis - the synthesis of glycogen from glucose
  2. Synthesis of lipids-phospolipids and cholesterol for example
  3. Detoxification of drugs and toxins
72
Q

What is Glycogenolysis?

A

The break down of glycogen to provide an energy source for the cell, it is the opposite of glycogenesis

73
Q

What is Gluconeogenesis?

A

The formation or synthesis of new glucose from non carbohydrate substances, such as amino acids

74
Q

What is the primary role of lysosomes?

A

phagocytosis

75
Q

Where do lysosomes come from?

A

Golgi Apparatus

76
Q

What kind of proteins are found within lysosomes?

A

hydrolytic enzymes

77
Q

What is the function of hydrolytic enzymes?

A

They break down organic structures into their component parts(proteins into amino acids for example), how foreign substances such as bacteria is dealt with by phagocytosis

78
Q

What is the primary function of peroxisomes?

A

Synthesis of hydrogen peroxide(H2O2)

79
Q

How does H2O2 affect foreign substances found within the cell?

A

Its highly destructive, hydrogen peroxide is protective to a point to the cell, but if it accumulates within the cell it will kill the cell

80
Q

What is the half-life of H2O2?

A

a split second, almost as soon as its formed it is inactivated

81
Q

What happens when H2O2 accumulates within the cell?

A

It starts breaking down the cell, killing it

82
Q

Hydrogen Peroxide is a member of a reactive oxygen species called?

A

Toxic Oxygen Radicals or Free Radicals

83
Q

Name 5 members of the Reactive Oxygen Species.

A
  1. Hydrogen Peroxide
  2. Superoxide(02-)
  3. Hydroxyl radicals(OH)
  4. Hypochlorous acid—>similar to household bleach
  5. Nitric Oxide(NO)
84
Q

What has happened in superoxide(O2-)?

A

oxygen has stolen a neg ion from the mitochondrial which must then steal one from somewhere else…bad sequence of events

85
Q

What is caused from these Reactive Oxygen Species; Toxic Oxygen Radicals or Free Radicals?

A

Accumulation of these substances result in the aging process, dementia, cancers for example.
Also sudden repercussion of ischemic tissue can cause rapid accumulation of these free radicals

86
Q

What are some examples of Toxic Oxygen Scavengers or Antioxidants?

A
  1. Vitamin E
  2. Vitamin C
  3. Beta carotene
  4. Flavonoids as in dark chocolate, pomegranate juice, cranberries, blueberries, Acai berries, red wines, green/black tea and others
87
Q

What is the function of Toxic Oxygen Scavengers or Antioxidants?

A

To seek out and to destroy the Reactive Oxygen Species such as free radicals

88
Q

The number and activity of mitochondria in a cell is dependent upon what?

A

the work load of that specific cell, how much energy it needs

89
Q

Mitochondrial DNA is formed where?

A

In the crista or the folds, within these folds are enzymes that are essential to DNA synthesis

90
Q

What is the function of mitochondrial DNA as opposed to nucleic DNA?

A

Mitochondrial DNA’s function is to cause the formation of more Mitochondria(very different from nuclear DNA) by duplication of more ribosomes

91
Q

Mitochondrial DNA is only passed through which parent?

A

maternal(mother, grandmother, great grandmother, great great grandmother for example)

92
Q

What is the function of the mitochondria?

A

Synthesis ATP(adenosine triphosphate)

93
Q

What is the function of adenosine triphosphate?

A

its the energy source of all cells

94
Q

What molecules makes up ATP?

A

Adenosine(hydrocarbon) and 3 inorganic phosphate groups

95
Q

What kind of bond is between the inorganic phosphate molecules of ATP?

A

High energy phosphate bond

96
Q

When this bond is broken how many calories(energy) is produces?

A

12000 calories or 12 kilocalories

97
Q

After the phosphate bond of ATP is broken what is left?

A

2 phosphate groups called Adenosine diphosphate(ADP)

98
Q

If the second phosphate bond is broken how much energy is released and what is the resulting phosphate group called?

A

12000,monophosphate(AMP)

99
Q

What is the amount of energy released if the last phosphate bond is broken in AMP?

A

7500 calories but it is controversial

100
Q

What is left when the last phosphate bond is broken?

A

Adenosine, which then can bind with other phosphate molecules forming AMP, ADP or ATP

101
Q

What effect does adenosine have on the vascular system?

A

its a potent vasodilator, which supplies more oxygen, more nutrients through energy supplied by ATP

102
Q

What effect does adenosine have when it is located in the kidneys?

A

potent vasoconstrictor

103
Q

When injected what does adenosine do to the heart?

A

stops it, blocks the SA node

104
Q

What is the definition of a (lower case c)calorie?

A

amount of heat energy required to raise 1 gm of water 1’ C (14-15’ C)

105
Q

What is the definition of a(upper case c)Calorie or Kilocalorie?

A

Amount of heat energy required to raise 1000 gm(1 kg) of water 1’ C (14-15 C’)

106
Q

How much energy is provided with the phosphate bonds are broken of ATP?

A

2 high energy phosphate bonds; each bond provide 12000 calories of energy
1 less high every phosphate bond provides ~ 7500 calories of energy

107
Q

How many steps are involved in glycolysis?

A

12 steps

108
Q

How many ATP are formed during glycolysis?

A

Total of 4 are formed, but 2 are used up to leaves a net of 2

109
Q

How many pyruvic acids are produced from glycolysis?

A

2

110
Q

In the anaerobic pathway how many molecules of lactic acid are formed?

A

2

111
Q

Anaerobic respiration yields how many ATP?

A

2

112
Q

In Aerobic respiration how many ATP are formed?

A

38

113
Q

What is the final product yield of glycolysis?

A
  • 2 molecules of pyruvic acid
  • 4 Gross ATP produced
  • 2 Net ATP produced(2 of they ATP are used during glycolysis)
114
Q

What are the 2 pathways pyruvic acid molecules can go?

A

aerobic and anaerobic

115
Q

What happens when pyruvic acid molecules follow the anaerobic pathway?

A

they are chemically reduced to form lactic acid molecules and yield a net of 2 ATP

116
Q

What happens when pyruvic acid molecules follow the aerobic pathway?

A
  • 2 Pyruvic acids transported from cytoplasm into the mitochondria
  • there they are converted into 2 molecules of Acetyl CoEnzyme A
  • each acetyl coenzyme A turns the citric acid cycle 1 turn
117
Q

If a molecule of glucose is metabolized aerobically in the most efficient, what is the yield of ATP(gross and net)?

A

Gross=40 ATP

Net=38 ATP

118
Q

What is by far the most preferred pathway in metabolism?

A

Aerobic

119
Q

What is the byproduct of anaerobic pathway?

A

Lactic acid

120
Q

What are the nutrients that a cell can metabolize for energy and their ideal order?

A
  1. Glucose from carbohydrates
  2. Fatty acids from lipids
  3. Amino acids from proteins
121
Q

What happens to glucose as soon as it crosses into the cytoplasm of the cell?

A
  • it transforms into glucose 6 phosphate, a high energy phosphate that attaches to carbons in glucose in order to trap the glucose inside the
  • In the process of dephosphoratizing an ATP to phosphoratize the glucose, 2 ATP are used immediately when glucose crosses the cell membrane and is converted to G6P.
122
Q

If a cell is not in need of any glucose for energy, which pathway will glucose 6 phosphate take?

A

Glycogenesis: synthesize glucose to glycogen

123
Q

What is the process to convert glycogen back to glucose?

A

Glycogenolysis

124
Q

What is the fatty acid metabolism process?

A
  • fatty acids transported across cell membrane into cytoplasm
  • they then enter into beta oxidation
  • beta oxidation converts fatty acids into molecules of acetyl coenzyme A(the number depends on how many carbons are in the fatty acid chain)
  • then citric acid cycle
  • then electron transport chain
  • then yield of ATP, H2) and CO2
125
Q

What is the amino acid metabolism process?

A
  • is various
  • can be converted to pyruvic acids, acetyl coenzymes a’s and also into amino acids of the Krebs cycle
  • ATP yield depends on which amino acid is used and where it enters into the metabolic pathways
126
Q

How many amino acids are in the human body?

A

20

127
Q

T or F: All atoms are electrically neutral

A

True, they all have the same number of protons and electrons

128
Q

If an atom loses an electron, what is it called?

A

oxidation

129
Q

Does an atom gain or lose energy when it loses an electron?

A

loses energy

130
Q

When a substance gains and electron, does it gain energy or lose energy?

A

gains energy

131
Q

Describe the electron transport chain process

A
  • hydrogen atoms are made available to the inner compartment(matrix) of the mitochondria thru special ways
  • 2 hydrogen transporters: NADH and FADH2
  • 1st structure accepts 2 electrons and uses the energy to pump a proton from the inner matrix to the outer matrix
  • then the 2 electrons are donated to the 3rd structure from the 1st, and the 3rd also accepts 2 electrons from the 2nd structure
  • the 3rd structure uses the electron energy to transport a proton from the inner matrix to the outer matrix
  • the 3rd structure donates 2 electrons to the 4th structure
  • the 4th structure uses the leftover electron energy to pump a proton from inner matrix to the outer matrix
  • this results in protons accumulating in the outer matrix
  • the 4th structure then has to get rid of the 2 electrons before it can accept 2 more, oxygen is the final acceptor
  • the 2 electrons are contributed to the 2 hydrogen ions(protons) to form 2 hydrogen atoms
  • those 2 hydrogen atoms combine with molecular oxygen to form water(H2O) byproduct
132
Q

What is the major purpose of NADH and FADH2

A

to deliver hydrogen into the inner matrix of the mitochondria

133
Q

What is the final electron acceptor of the electron transport chain?

A

oxygen

134
Q

What is the final byproduct of the electron transport chain?

A

water

135
Q

What is phosphorylation?

A
  • addition of high energy inordinate phosphate group
  • requires an enzyme, such as kinase
  • adds energy and usually activates, but may inactivate/inhibit, the substance to which its added
136
Q

What is dephosphorylation?

A
  • removal of high energy inorganic phosphate group
  • requires an enzyme, such as phosphatase
  • removes energy and may inactivate/inhibit the substance from with it is removed
137
Q

What is an ATP coupled reaction?

A

the often simultaneous addition and subtraction of energy through phosphorylation and dephosphorylation, going from ADP to ATP, or from ATP to ADP

138
Q

What is oxidation-reduction coupled reactions?

A
  • the process of releasing and accepting electrons

- an atom or molecule LOSES electrons(oxidized) and another atom or molecule GAINS electrons(reduced) simultaneously

139
Q

What is reduction?

A
  • an atom or molecule GAINS electrons

- Gain of hydrogen atom

140
Q

What is oxidation?

A
  • an atom or molecule LOSES electrons

- Loss of hydrogen atom

141
Q

What is the result of Ferric when it is chemically reduced?

A

it gains and electron and is now Ferrous

142
Q

What is the result if Ferrous is oxidized?

A

It loses and electron and is now Ferric

143
Q

What is the result if pyruvic acid(Pyruvate) is chemically reduced?

A

It gains an electron and is transformed into Lactic acid(Lactate)

144
Q

What is the result of Lactate if oxidized?

A

It loses an electron and is transformed into Pyruvic acid(Pyruvate)

145
Q

What is the result of Nicotinaminde adenine dinucleotide(NAD+) if it is chemically reduced with 2 H?

A

It gains 2 electrons and 1 proton and is transformed into NADH+(H+)

146
Q

What is the result if flavin adenine dinucleotide(FAD) is chemically reduced with 2H?

A

It gains 2 electrons and 2 protons and is transferred into FADH2

147
Q

T or F: In the human body, most acids are in the ion state?

A

True

148
Q

What is the name of the process that occurs in hepatocytes in which lactic acid is converted back to glycogen?

A

The Cori Cycle

149
Q

What happens in during The Cori Cycle?

A
  • the lactic acid that is the end result of anaerobic metabolism of pyruvic acid enters the liver and their if needed, it is changed back to pyruvic acid by an enzyme named phosphotase
  • lactic acid is oxidized back to pyruvic acid which forms bicarbonate as a byproduct
  • the pyruvic acid is further changed into Glucose-6-phosphate where it is either stored as glycogen or delivered to the blood as glucose
150
Q

In non-liver cells what is the name of the enzyme that converts glucose?

A

hectokinase

151
Q

What is gluconeogenesis?

A

formation of new glucose from noncarbohydrate substances

152
Q

What is the main fatty acid used for energy and by what process?

A

triglyceride, beta oxidation

153
Q

Whats happens to amino acids in transamination?

A

A nonessential fatty acid is converted(transaminated) to an essential fatty acid.

154
Q

What happens to amino acids in Oxidative deamination?

A

The amino acid is broken down to be an energy source(ketoacid)

155
Q

What is the byproduct of Oxidative deamination?

A

Ammonia

156
Q

What are some examples of apoptosis?

A
  • loosing web between fingers and toes before birth

- immune system cells recognize self-cells

157
Q

If a membrane protein is a cell marker what is its function?

A

Regulate self vs. non-self, It will not develop an immune response for the self but initiate an immune response for the non self

158
Q

How is it that lipid soluble substances can cross the cell membrane?

A

Because the cell membrane is a phospholipid by layer. It can cross cause its lipid soluble

159
Q

Name 4 examples of substances that are lipid soluble that can cross through the cell membrane.

A

Oxygen, Carbon dioxide, Nitrogen, alcohol

160
Q

For substances not lipid soluble or electrically charged how do they cross the cell membrane?

A

Has to cross via protein channels

161
Q

Where do lysosomes originate as opposed to where peroxisomes come from?

A
  1. Lysosomes come from the RER and breaks off to the Golgi Apparatus, they carry a hydrolytic enzyme that carries out phagocytosis.
  2. Peroxisomes come from the SER, they carry an enzyme that can carry water and oxygen and them make hydrogen peroxide. It breaks down organic bacteria
162
Q

What is the difference between Glucokinase vs. Hexokinase used during Beta Oxidation.

A

Glucokinase is reversible by Phosphokinase and is found in liver cells. Hexokinase is not reversible and is found in non-liver cells.

163
Q

Where does ammonia come from?

A

It is a by product of Oxidative deamination. It goes to the liver to be converted to urea to be excreted by the kidnesy

164
Q

What is metabolism?

A

Protein being broken down to amino acids and using it as an energy source.

165
Q

What are the 3 ketone bodies?

A
  • Acetoacetic acid
  • Beta hydroxybutyric acid
  • Acetone
166
Q

When are ketone bodies formed?

A

When acetyl-coenzyme A accumulates faster than the citric acid cycle can accommodate it.

167
Q

What can cause the accumulation of acetyl-coenzyme A?

A

as a result of beta-oxidation of fatty acids or catabolism of ketogenic amino acids

168
Q

What is yielded by one turn of the Kreb cycle?

A
  • 1 ATP
  • 3 NADH
  • 2 FADH2
  • 2 CO2
169
Q

What happens in Glycolysis?

A

1 Glucose molecule is changed to G-6-p once it crosses the cell membrane.
Through phosphorylation becomes Pyruvic Acid.
Net yield of ATP is 2 as well as 2 NADH

170
Q

What happens after glycolysis?

A

The 2 pyruvic acids are taken into the mitochondria and changed to 2 acetyl coenzyme A. Each acetyl coenzyme A will turn the Kreb cycle 1 turn.

171
Q

What is the yield of 1 turn of the Kreb cycle?

A 
1 ATP
3 NADH
1 FADH2
2 CO2
----------
total ATP yield from the Kreb cycle is 12 ATP
172
Q

What is the first acid formed by the Kreb cycle and the last?

A

Citric Acid and Oxaloacetic Acid

173
Q

What is the total yield from the Electronic Transfer System?

A

including the NADH/FADH2 from the Kreb Cycle are brought into the ETC to transport Hydrogen, the total yield is 34 yield ATP/6 H20

So these 34 plus the 2 ATP from glycolysis and the 2 from Anerobic respiration = 38 total ATP

174
Q

How does fatty acids lead to ATP formation?

A

Tryglerides broken down into glycerol and fatty acid chains. Glycerol can join the glycolysis path via gluconeogenesis. The fatty acid chain become acytel coenzyme through beta oxidation. Each acytel coenzyme can turn the Kreb cycle 1 turn.

175
Q

How many ATP can be formed from 1 fatty acid beta oxidation?

A

17

176
Q

Calculate the ATP value for a 16 fatty acid chain.

A 
so that would be 7 beta oxidations
7 NADH x 3
7 FADH2x2
7 acety CEAx12
-------------------
119 ATP
\+12(for the first Acyety that didnot undergo BO
--------
131 ATP
- 2 ATP to start with
-----------
129 ATP net yield
177
Q

So what would 1 trygleride molecule yield if it had a 16 C chain?

A

129 x 3=387 ATP

2nd Quarter (27 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions