Anatomy Ch.2 and Ch.3 Flashcards
pH scale
indicates concentration of hydrogen ions in solution
Neutral pH
pH of 7, indicates equal concentrations of H+ and OH-
Acidic ph
pH less than 7, indicates greater concentration of H+
Basic (or Alkaline) pH
pH greater than 7, indicates greater concentration of OH-
What are the 4 organic substances?
carbohydrates, lipids, proteins, nucleic acids
What are the 4 inorganic substances?
water, oxygen, carbon dioxide, inorganic salts
organic molecules
contain carbon and hydrogen, larger than inorganic molecules, dissolve in water and organic lipids
inorganic molecules
don’t contain carbon and hydrogen, smaller than organic molecules, dissociate in water, forming ions
Water
- most abundant compound in living material
- 2/3 of weight of adult human
- major component of all body fluids
- medium for most metabolic reactions
- important role in transporting chemicals in body
- absorbs and transports heat
Oxygen
- used by organelles to release energy from nutrients in order to drive cells metabolic activities
- necessary for survival
Carbon Dioxide
- waste product released during metabolic reactions
- must be removed from the body
Inorganic Salts
- abundant in body fluids
- sources of necessary ions (Na+, Cl-, Ca2+, etc)
- play important roles in metabolism
Metabolic reaction
multi step process that turns your food into energy
Carbohydrates
- provide energy to cells
- supply materials to build cell structures
- contain C, H, and O
Disaccharide
a sugar formed when two monosaccharides are conjoined, made of sucrose and lactose
Polysaccharide
a carbohydrate whose molecules consist of multiple sugar molecules bonded together, made of glycogen and cellulose
Glycogen
Glycogen is the stored form of glucose, glycogen is stored in your muscles and liver, it is a quick get for metabolic sugar, it’s quickly turned to glucose because we are sugar burners
Glycogen
Glycogen is the stored form of glucose, glycogen is stored in your muscles and liver, it is a quick get for metabolic sugar, it’s quickly turned to glucose because we are sugar burners
Lipids
fats, soluble in organic solvents; insoluble in water, lipids contain number of compounds which are fats, phospholipids, and steroids
triglyceride
used primarily for energy, most common lipid in your body, building blocks are 1 glycerol and 3 fatty acids per molecule
saturated fat
type of fat that contains single bonds
unsaturated fat
type of fat that contains one or more double bonds
polyunsaturated fats
many double bonds in the fatty acids, is better for you
monounsaturated fat
contains single bonds in the fatty acids
what are the building blocks of fat molecules
fatty acids and glycerol
phospholipids
building blocks are 1 glycerol, 2 fatty acids, and 1 phosphate per molecule
phospholipids are major components in what
cell membranes
Steroids
complex structures, 4 connected rings of carbon, components of cell membranes, widely distributed in the body, used to synthesize hormones, cholesterol is a very important steroid
Do water and fats mix
no, water and fats do not mix
How do cell membranes keep water out of the cell
with fats (phospholipids), water doesn’t mix with fats so won’t go through it, the water has to enter through protein channels
Proteins
structural material, energy source, hormones, receptors, enzymes, antibodies
What are the building blocks of proteins
amino acids
Amino acids are held together by what
peptide bonds
When 2 amino acids come together you get a
peptide bond
you have strands of protein in _______
literally everything
enzymes
speed up chemical chemical reactions and are not changed by the reaction which means they can be reused (recyclable), they do degrade after awhile so you need new ones eventually
all enzymes are what
proteins
NH2
amine group
antibodies
proteins that are used to defend us from sickness “denaturing of proteins”
What are some examples of proteins being denatured
Basically denaturing protein is a process where something modifies the molecular structure of a protein
heat can denature protein (melt)
radiation can denature protein (sun ultraviolet radiation)
electricity can denature protein
chemicals can denature protein
Nucleic acids
carry genes, encode amino acid sequences of proteins
What are the building blocks of nucleic acids
nucleotides (which are made up of phosphate, sugar and a base)