digestion Flashcards
hydrolyses polysaccharides into oligosaccharides
salivary amylase
breaks down lipids, mostly activated in acidic environment
lingual lipase
coats the bolus to facilitate swallowing
mucus
kills bacteria on food
lysozyme
made by parietal cells and activates lipase and pepsinogen
HCl
made by chief cells and breaks down protein into peptides (inactive form of pepsin)
pepsinogen
digestive hormone that stimulates HCl production
gastrin
made by chief cells and breaks down lipids in the stomach
gastric lipase
hormone that stimulates the liver and pancreas
secretin
hormone that stimulates the gallbladder and the pancreas
CCK
pancreatic amylase
breaks down carbs
pancreatic lipase
breaks down lipids
pancreatic trypsin
breaks down proteins
pancreatic chymotrypsin
breaks down proteins
pancreatic carboxypeptidase A and B
breaks down proteins
pancreatic peptidase
breaks down proteins
pancreatic colipase
breaks down lipids
pancreatic phospholipase
breaks down lipids
neutralizes the acidic HCl in chyme to make it around pH of 7
sodium bicarbinate
made in the liver, stored in gallbladder and helps digestion
bile (bile salt and lecithin)
cholesterol esterase
breaks down lipids
sucrase
breaks down sucrose
maltase
breaks down maltose
sucrose is made of…
glucose and fructose
maltose is made of…
glucose and glucose
lactose is made of…
glucose and galactose
nutrients that our body needs lots of (carbs, fats, proteins, water)
macronutrients
nutrients that our body needs in small amounts (vitamins, minerals)
micronutrients
the simplest form of carbs, made of one molecule
monosaccaride
2 molecules bonded together, carb
disaccaride
3-9 molecules bonded together, carb
oligosaccaride
10 and more molecules bonded together, carb
polysaccaride
a fatty acid with the maximum amount of hydrogen available attached (4 on each carbon)
saturated fatty acids
a fatty acid where 2 hydrogen atoms are missing, form double bonds between two carbons
unsaturated fatty acids
a fatty acid with one double bond
monounsaturated fatty acids
polyunsaturated fats that have the double bond between the 3rd and 4th carbon
omega-3 fatty acids
polyunsaturated fats that have the double bond between the 6th and 7th carbon
omega-6 fatty acids
anabolism+ catabolism
metabolism
smaller molecules are converted into larger molecules
anabolism
larger molecules are converted into smaller molecules
catabolism
the breakdown of glucose into pyruvic acid
glycolysis
the process that involves the removal of a water molecule to form glycogen from multiple glucose molecules
glycogenesis
what percentage of the body’s glycogen is stored in the liver?
25%
what percentage of the body’s glycogen is stored in the skeletal muscles
75%
the breakdown of glycogen when dietary glucose is low
glycogenolysis
the generation of glucose in the liver from lactate and non-carbs
gluconeogenesis
the process of releasing triglycerides from body’s fat stores (adipose)
lipolysis
where cells increase their individual mitochondrial mass and number to increase ATP production
mitochondrial biogenesis
the volumes of sarcoplasmic fluid in muscle cells increase with no increase in strength
sarcoplasmic hypertrophy
actin and myosin increase in number and add to muscular strength and size
myofibrillar hypertrophy
starvation
malnutrition
obesity
overnutrition
hunger
undernutrition
vitamins that help with teeth
C,D,A,K
vitamins that can dissolve in fat and be stored in liver as adipose
fat-soluble vitamins
vitamins can dissolve in water and overdose is nontoxic
water-soluble vitamins
minerals needed in body
Ca, Cl, Mg, Na, K, P
functions of water
transport of nutrients, thermoregulation, lubrication, communication of cells
functions of proteins
structure and support, repair tissue, amino acids and DNA repair
lipids/1000 g=
4000Kj
carbs/1000 g=
1760Kj
carbs and lipids have what elements
C,H,O
proteins contain what elements
C,H,O,N
what is apart of the alimentary canal
mouth, esophagus, stomach, small intestine, and large intestine
emulsification
bile and lipase breaks down fat globules into smaller molecules to be absorbed
role of villi and microvilli
to increase surface area, villi(10x), microvilli(20x)
when fatty acids are broken down into acetylcholine in the mitochondria to be used in the Krebs cycle to make ATP
beta-oxidation
combined monoglycerides and bile salts that helps transport into the cell for absorption
micelles
helps absorb fats into body’s lymph by reforming triglycerides
chlyomicrons
where chlyomicrons are absorbed (fats) and the connect to the blood system
lymph/subclavian vein
how does fructose become absorbed?
facilitated diffusion with GLUT5 protein
how does glucose and galactose become absorbed?
active transport with SGLT protein
what is the ratio of C:H:O in carbs
1:2:1
role is healing healthy treats and gums and healthy tissue
vitamin C
role is RBC production, CNS aid, metabolism
vitamin B12
role is to help use vitamin K, and RBC production
vitamin E
role is to help bones and teeth, sunshine vitamin
vitamin D
role is to help skin, teeth, and bones
vitamin A
role is to help blood coagulate, and bone health
vitamin K