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digestive system
49 cards·by tiwright
2 functions of the Pancreas?
endocrine and exocrine function
describe the exocrine function of the pancreas?
enzymes, proteases, lipase, nucleases, amalyse(breaks down starch into simple sugars)
describe the endocrine function of the pancreas?
insulin stimulates tissues to absorb glucose from blood and convert into glycogen.Glucagon
stimulates tissues to convert to glucose
simple sugars
glucose, fructose, ribose (GFR)
disaccharide
two simple sugars: lactose, sucrose (LS)
polysaccharides
long chains of simple sugars. Glycogen, starch (GS)
DNA
deoxyribonucleic acid
double helix
strands bound by hydrogen bonds between N bases
RNA
ribonucleic acid. single strand-assembled at the gene. Transported out of nucleus for
protien synthesis.
3 common apoproteins are...
VLDL, LDL, HDL
VLDL stands for...
very low density lipoproteins- transports triglycerides to tissues
LDL stands for...
low density lipoprotein- transports cholesterol to tissue
HDL stands for....
high density lipoproteins-removes excess cholesterol from tissue and returns to liver
Gastric phase in stomach
arrival of food causes muscular reflexes and secretion of gastrin, resulting in increased
mobility and secretion.
what are the organic compounds ? (5)
carbohydrates, lipids, proteins, nucleic acids, high energy compunds
what are the 3 phases of the stomach?
cephalic, gastric, intestinial
Liver
produces bile, and bile salts.
Liver
produces bile, and bile salts.
what is bile?
bright green waste product from worn out rbc's.
bile salts?
produced from cholesterol, emulsifies dietary fats, acts like detergent
secondary structure of proteins?
folding due to adjacent amino acid interaction
Cephalic phase of stomach
parasympathetic activation increases motility and stimulates secretion of acids, mucus
and enzymes
hydrophobic molecules
enter the lacteal during absorption into the villus. fatty acids, cholesterol and vitamins
enter the lymphatic system and bound to proteins
primary structure of proteins
amino acid sequence ecoded by DNA
the four classes of dietary molecules
proteins, carbohydrates, lipids, nucleic acids
function of the esophagus?
persitalsis
hydrophillic molecules
enter the capillaries during absorption into the villus. (amino acids, simple sugars,
nucleotides, etc. transported to the liver for detox..
cell metabolism
why you need food and oxygen
phospholipids
fatty acids=HYDROPHOBIC. phosphate=HYDROPHILLIC
hemoglobin
secondary-helixes tertiary-folded portions interact at different locations
quartenary-4 gene products from 2 different genes
insulin
hormones controlling blood sugar
functions of the colon
contain huge amt. of coliform bacteria. Bacteria produce vitamin B water absorption.
compactio of feces
what can happen if you get the wrong kind of bacteria in the colon?
diahrea and dysentry, inflammation of the epithelia leads to severe water loss from blood,
dehydration may lead to death.
what can happen if you get the wrong kind of bacteria in the colon?
diahrea and dysentry, inflammation of the epithelia leads to severe water loss from blood,
dehydration may lead to death.
lipids
fats.
3 kinds of lipids and describe
triglycerides- 3 fatty acids. Animal fats-saturated fatty acids. Vegetable fats-
essential unsaturated fatty acids
ATP
adenosine triphosphate- necessay for all body functions that require energy
parts of the oral cavity?
taste, mastication, mobile tongue, cheeks and lips, saliva, deglutination
quartenary structure of proteins
multiple gene products are assembled to produce a functional protein.
metabolic heirarchy of energy metabolism (order of energy exploitation)
blood sugar, mobilize gycogen, mobilize triglycerides, mobilize proteins:skeletal
muscle
proteins
gene products, chains of amino acids, amino acid sequence of a protein is encoded by a gene
colon cancer
one of the leading causes of cancer related deaths, high rates associated w/ fatty diets.
Diets rich in fiber can reduce occurence.
gastric pit cells
secretes hcl and pepsin.
intestinial phase in stomach
arrival of food in duodenum of small intestine trigers release of hormones that block the
effect of gastrin and inhibit gastric activity
cell membrane
carry cell identity
tertiary structure of protein
folding and stabilization due to interaction of non-adjacent amino acids
hydrophobic interior
slows the passage of water through the membrane
saturated fatty acids are synthesized into...?
cholesterol
nucleic acids
DNA and RNA