BIOD 121 PORTAGE MODULE 2 EXAM QUESTIONS AND ANSWERS GRADED A+ 2025/2026

BIOD 121 PORTAGE MODULE 2 EXAM
QUESTIONS AND ANSWERS GRADED A+
2025/2026




Protein digestion - ANS 1. cooking
2. pepsin (in stomach)
3. cholecystokinin -CCK (small intestine) - travels to pancreas, releases trypsin back to SI
4. trypsin - breaks peptide chains
5. amino acids absorbed through portal vein to liver


digestion - ANS transforming food into basic nutrients that can be absorbed and used by the
body


sensory stimuli before digestion - ANS cognition
sound
odor
appearance
taste


peristalsis - ANS Involuntary waves of muscle contraction that keep food moving along in one
direction through the digestive system.



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, digestive enzymes - ANS catalyze the chemical reactions required to break down food
particles into smaller parts, which prepares the nutrients for absorption


mucosa - ANS intestinal wall, innermost layer


circular and longitudinal muscles - ANS mix and move food along the GI tract


passive diffusion - ANS substances move without energy
high to low concentration


facilitated diffusion - ANS special protein carrier is required to help substances cross in or out
of the cell
high to low concentration


active transport - ANS requires energy
low to high concentration


GI tract 6 main parts - ANS 1 - mouth
2 - esophagus
3 - stomach
4 - small intestine
5 - large intestine
6 - rectum


GI tract accessory organs - ANS salivary glands, liver, gallbladder, pancreas


mouth - ANS alter food particles for swallowing
mechanical and chemical digestion


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