protein digestion - correct answer 1. cooking
2. pepsin (in stomach)
3. cholecystokinin -CCK (small intestine) - travels to pancreas, releases trypsin
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4. trypsin - breaks peptide chains
5. amino acids absorbed through portal vein to liver
digestion - correct answer transforming food into basic nutrients that can be absorbed and used by the body
sensory stimuli before digestion - correct answer cognition
sound
odor
appearance
taste
peristalsis - correct answer Involuntary waves of muscle contraction that keep food moving along in one direction through the digestive system.
digestive enzymes - correct answer catalyze the chemical reactions required to break down food particles into smaller parts, which prepares the nutrients for absorption
mucosa - correct answer intestinal wall, innermost layer
circular and longitudinal muscles - correct answer mix and move food along the GI tract
passive diffusion - correct answer substances move without energy
high to low concentration
facilitated diffusion - correct answer special protein carrier is required to help substances cross in or out of the cell
high to low concentration
active transport - correct answer requires energy
low to high concentration
GI tract 6 main parts - correct answer 1 - mouth
2 - esophagus
3 - stomach
4 - small intestine
5 - large intestine
6 - rectum
GI tract accessory organs - correct answer salivary glands, liver, gallbladder, pancreas
mouth - correct answer alter food particles for swallowing
mechanical and chemical digestion
saliva - correct answer mucus plus digestive enzymes
mucus - correct answer lubricates food particles for swallowing
salivary amylase - correct answer Enzyme in saliva that breaks down starch
lingual lipase - correct answer a fat-splitting enzyme secreted by cells at the base of the tongue
esophagus - correct answer transports food to the stomach
epiglottis - correct answer a flap of cartilage that covers the trachea while swallowing
sphincter muscle - correct answer circular muscle at the end of esophagus, prevents backflow of food
stomach - correct answer 4 cup capacity
holds food 2-4 hrs until ready to pass into the small intestine
store, mix, dissolve, and continue the digestion of food
gastric juice - correct answer The acidic secretion of the stomach
prepares proteins for digestion and activates enzymes
pepsin - correct answer An enzyme present in gastric juice that breaks down proteins
gastric lipase - correct answer enzyme to digest fat [Show Less]