cellular biology Flashcards

1
Q

eukaryotes vs prokaryotes

A

eukaryotes has nucleus
prokaryotes does not have nucleus

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2
Q

8 cellular functions of eukaryotes

A

movement
conductivity
metabolic absorption
secretion
excretion
reproduction
respiration
communication

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3
Q

cytoplasm

A

aqueous solution called cytosol
contains enzymes for metabolism
suspends and provides structure for organelles
storage for fat and carbohydrates
supports various organelle functions including synthesis/transport of proteins and hormones

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4
Q

cytoskeleton (3 functions)

A
  1. provides supportive matrix structure
  2. cellular movement
  3. allows cells to change their shape to engulf in the phagocytosis process
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5
Q

microfilaments in cytoskeleton

A

actin filaments 1: movement MSK
actin filaments 2: pseudopods to change cellular shape for phagocytosis
intermediate filaments: strong and not flexible, anchor
microtubule filaments: hollow and transport
movement filaments: microvilli e.g. sperm

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6
Q

nucelues

A
  1. genetic materials divison/replication
    repari/RNA/protein information storage
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7
Q

function of the nucleolus:

A

transcription

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8
Q

nuclear envelope is connected to ___

A

ER (SER and RER)

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9
Q

RER (3 purpose)

A
  1. protein synthesis
  2. protein folding and supercoiling
  3. protein activation
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10
Q

SER (4 purposes)

A
  1. lipid synthesis
  2. CYP450 enzymes
  3. Glucose
  4. calcium stroage
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11
Q

golgi apparatus =

A

packaging centre

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12
Q

purpose of lysosome (3)

A
  1. macro particle breakfown
  2. autophagy of organelles
  3. autolysis of damaged cell
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13
Q

purpose of peroxisome (3)

A

1.breakdown free radicals
2. fatty acid/lipid/cholesterol metabolism
3: ethanol metabolism

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14
Q

two main oxidative enzymes in peroxisome

A

catalase
oxidase

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15
Q

___ contain hydrolytic enzymes
examples of hydrolytic enzymes

A

lysosome contain hydrolytic enzymes
they are protease, nuclease, lipase, glucosidase

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16
Q

mitochondria

A
  1. ATP synthesis
  2. metabolic reactions
  3. regulation process (pH control, cell signaling, osmotic regulation)
17
Q

caveolae

A

caves that can capture extracellular material and shuttle it inside the cell

18
Q

vaults

A

cytoplasmic ribonucleoproteins
“truck” shuttling molecule from nucleus to elsewhere in the cell

19
Q

cell/plasma membrane functions

A
  1. structure/storage
  2. protection
  3. activation of the cell (e.g. hormones)
  4. cell to cell interaction
20
Q

phospholipid bilayer

A

tail: hydrophobic
head: hydrophilic

21
Q

protein functions

A

transport channels/carriers
enzymes
receptors
surface markers
cell adhesino molecules
catalysts

22
Q

5 reasons for cellular communcation

A

Maintain Homeostasis
Regulate growth and division
Develop and organize into cells to form types of tissue
Function coordination
Cell death process

23
Q

cellular transduction pathway results in

A
  1. divide growth
  2. survive
  3. differentiation
24
Q

4 types of cellular communication

A
  1. receptors
  2. remote signaling by secreting molecules
  3. direct contact: e.g. gap junctions
  4. chemical signaling
25
Q

6 types of chemical signaling in cell-cell communication

A
  1. contact dependent
  2. paracrine
  3. autocrine
  4. hormone
  5. neurohormone
  6. neurotansmitters
26
Q

3 characteristics of stems cell

A
  1. Self renewal
    1. Proliferation
    2. differentiation
27
Q

3 key factors that maintain the cellular organization of tissues

A
  1. Recognition and cell communication
    1. Selective cell-to-cell adhesion
  2. memory