BiSci #4 (Exam 2)

Question 1

pathway that food follows

Answer 1

1. mouth (oral/nose)
2. pharynx
3. esophagus
4. stomach
5. small intestine
6. large intestine
7. rectum
8. anus

Question 2

mechanical digestion

Answer 2

chewing of food, churning action of the stomach, and segmentation of the small intestine

Question 3

chemical digestion

Answer 3

action of enzymes on foods

Question 4

3 pairs of salivary glands

Answer 4

secrete salivary amylase that begins the process of digesting starch

Question 5

tongue

Answer 5

mixes chewed food with saliva and forms bolus

Question 6

uvula

Answer 6

slows down food

Question 7

pharynx

Answer 7

passageway behind the uvula for air, liquids, and food

• swallowing reflex begins here
• epiglottis covers opening of the trachea when swallowing

Question 8

esophagus

Answer 8

passes thru the diaphragm to join the pharynx to the stomach

Question 9

peristalsis

Answer 9

rhythmic contractions that move food along the esophagus to the stomach

Question 10

sphincters

Answer 10

circular muscles that control the entrance and exit of materials to and from the stomach

Question 11

acid reflux

Answer 11

heartburn occurs when the chyme comes up into the esophagus and produces a burning sensation

Question 12

chyme

Answer 12

whats coming out of the stomach