21.What the primary function of the rectum? a.control functioning of the : 1401534

21.What the primary function of the rectum?
a.control functioning of the : 1401534.


21.What is the primary function of the rectum?

a.control functioning of the colon

b.absorb minerals from waste materials

c.store waste materials prior to evacuation

d.absorb excess water from waste materials

22.Into what region of the intestinal tract does the stomach empty?





23.After swallowing, in what order does food pass through the regions of the GI tract?

a.jejunum, duodenum, colon, ileum, rectum

b.jejunum, ileum, duodenum, rectum, colon

c.stomach, duodenum, jejunum, ileum, colon

d.stomach, jejunum, duodenum, colon, ileum

24.Which of the following is a description of chyme?

a.the semisolid mass of undigested food which passes through the ileocecal valve

b.a semiliquid mass of partially digested food released by the stomach into the small intestine

c.the mixture of pancreatic juices containing enzymes for digestion of the macronutrients

d.a thick, viscous material synthesized by mucosal cells for protection against digestive juices

25.What is the name given to partially digested food in the stomach?


b.liquid food

c.gastric mucus

d.semiliquid mass

26.What is meant by the term “motility” in reference to the GI tract?

a.the efficiency of lymph transport

b.the ability of the GI tract muscles to move

c.the speed of gastric digestive juice release

d.the speed of pancreatic digestive juice release

27.Which of the following best defines peristalsis?

a.It is the static or quiet period between meals when the GI tract is empty.

b.It is the constant rate of contraction along the GI tract when food is present.

c.It is contraction of parallel and circular muscles found in the walls of the intestines but not the stomach.

d.It is wavelike muscular contractions resulting from alternate tightening and relaxing of circular and longitudinal muscles of the GI tract.

28.Which of the following best describes the muscular actions of digestion?

a.Peristalsis begins in the stomach upon the initiation of the swallowing reflex.

b.Contraction and relaxation along the jejunum is enhanced by a third layer of diagonal muscles.

c.Segmentation along the intestines allows momentary reversal of the movement of intestinal contents.

d.Relaxation of the rectal sphincter muscles prevents the continuous elimination of stool.

29.During the process of digestion, at what point does the stomach begin to release chyme?

a.when the fluid to solid ratio in chyme  is 3 to 1

b.when the chyme is liquefied

c.within 15 minutes of gastrin release

d.within 5–10 minutes of starting a meal

30.Which of the following GI tract organs has the strongest muscles?


b.small intestine

c.large intestine

d.cardiac sphincter



21.What the primary function of the rectum?
a.control functioning of the : 1401534

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