23. The Digestive System

The peritoneal cavity:

a. Is the same thing as the abdominopelvic cavity

b. Is filled with air

c. Like the pleural and pericardial cavities is a potential space containing serous fluid

d. Contains the pancreas and all of the duodenum

Individuals experiencing prolonged vomiting lose a great deal of hydrochloric acid with the vomitus. Predict the effect this loss of acid will have on the pH of the blood. How will the respiratory system respond to the change in pH?

The peritoneal cavity is located:

a. Around each of the digestive organs

b. Between layers of mesentery

c. Superior to the greater omentum

d. Between the parietal and visceral peritoneum

Increased parasympathetic stimulation of the intestine would result in

(a) Decreased motility

(b) Decreased secretion

(c) Decreased sensitivity of local reflexes

(d) Decreased segmentation

(e) None of these

The outer layer of the digestive tract is known as the

(a) Serosa

(b) Mucosa

(c) Submucosa

(d) Muscularis

Name the six functional activities of the digestive system.

Label the digestive system structures in the following figure.

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a. ___

b. ___

c. ___

d. ___

e. ___

f. ___

g. ___

h. ___

i. ___

j. ___

k.___

Which is more essential to life and why: chemical digestion or mechanical digestion?

The digestive juice product containing enzymes capable of digesting all four major foodstuff categories is:

a. Pancreatic

b. Gastric

c. Salivary

d. Biliary

Which of the following are true for digestion:

I. Chemical digestion begins in the stomach.

II. Digestion involves breaking down food both physically and chemically.

III. Mechanical digestion increases the surface area of ingested food.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

The muscularis externa of most of the alimentary canal consists of inner circular and outer longitudinal layers of smooth muscle.

True or False: if false, choose the answer that best corrects the statement.

While the accessory organs contribute important digestive enzymes and fluids, all digestions and absorption of nutrients takes place in the alimentary canal/GI tract.

Four organs are listed below. During food’s path through the alimentary canal, the partially digested food passes through the lumen of each of these organs except: