Lecture 64

Question 1

What 3 glands is saliva secreted from?

Answer 1

Parotid, submandibular, and sublingual glands

Question 2

What is the composition of saliva? (percentages)

Answer 2

99. 5% water

0. 5% solutes

Question 3

Where are lingual lipase and salivary amylase found?

Answer 3

saliva

Question 4

What is the function of lingual lipase?

Answer 4

it is a digestive enzyme that acts on triglycerides

Question 5

What is the function of salivary amylase?

Answer 5

it is a digestive enzyme that acts on starches (carbohydrates)

Question 6

What is immunoglobulin A?

Answer 6

secreted type of antibody that prevents attachment of microbes so they cannot penetrate epithelium

Question 7

What is the function of bacterial lysozyme?

Answer 7

lyses bacteria

Question 8

Where is immunoglobulin A and bacterial lysozyme found?

Answer 8

saliva

Question 9

True or False? Each salivary gland secretes different proportions of water and solutes

Answer 9

True

Question 10

What is salivation controlled by?

Answer 10

the ANS

Question 11

What effect does the PNS have on salivation?

Answer 11

stimulates

Question 12

What effect does the SNS have on salivation?

Answer 12

inhibits

Question 13

When does the lingual lipase become active?

Answer 13

once it is in the acidic environment of stomach

Question 14

When does the lingual lipase become active?

Answer 14

once it is in the acidic environment of stomach

Question 15

What pushes food downward by coordinated contractions of circular and longitudinal muscles?

Answer 15

peristalsis

Question 16

What prevents stomach contents from moving into esophagus?

Answer 16

the lower esophageal sphincter

Question 17

What prevents stomach contents from moving into esophagus?

Answer 17

the lower esophageal sphincter

Question 18

In the stomach, the bolus of food is reduced to a liquid substance called what?

Answer 18

Chyme

Question 19

Where does the digestion of protein and fat begin?

Answer 19

in the stomach