Question

question 11 1 pts
saliva contains the enzyme
lipase.
trypsin.
pepsin.
amylase.
question 12 1 pts
stimulation of gastric juice secretion occurs in all of the following phases except the ____
phase.
cephalic
digestive
gastric
intestinal
question 13 1 pts
the final step in lipid transport by the intestines is the formation of
micelles.
chylomicrons.
bile.
sodium bicarbonate.

Explanation:

Question 11

Saliva contains salivary amylase (also called amylase) which starts the digestion of starch. Lipase (digests lipids) is in pancreatic juice and some gastric juice, trypsin (digests proteins) is in pancreatic juice, and pepsin (digests proteins) is in gastric juice. So the correct enzyme in saliva is amylase.

Gastric juice secretion has three phases: cephalic (stimulated by sight/smell of food), gastric (stimulated by food in stomach), and intestinal (regulatory, can stimulate or inhibit). There is no "digestive" phase for gastric juice secretion. So the answer is the digestive phase.

In lipid transport by intestines, after micelles (which help absorb lipids) are formed, the final step is the formation of chylomicrons (lipoprotein particles that transport dietary lipids). Bile emulsifies lipids, sodium bicarbonate neutralizes acid. So the final step is chylomicrons.

Answer:

D. amylase

Question 12