Chapter 25- The Digestive System

The actions involved in the mechanical processing of food include all but which of the following?

a. absorption

b. squashing foods with the tongue

c. tearing or crushing foods with the teeth

d. churning of swirling of foods by the stomach

A

Digestion refers to

a. the progressive dehydration of indigestible residue

b. the input of food into the digestive tract

c. the chemical breakdown of food

d. the absorption of nutrients into the gut

C

Most of the digestive tract is lined by

a. pseudostratified ciliated columnar epithelium

b. cuboidal epithelium

c. stratified squamous epithelium

d. simple columnar epithelium

D

The ___ are double sheets of peritoneal membrane that hold some of the visceral organs in their proper position

a. serosa

b. adventitia

c. mesenteries

d. fibrosa

C

The activities of the digestive system are regulated by

a. hormones

b. parasympathetic neurons

c. sympathetic neurons

d. all of the above

D

Sandwiched between the layer of circular and longitudinal layer in the muscular layer is the

a. mucosa

b. submucosa

c. muscularis mucosa

d. myenteric neural plexus

D

The mesentery that suspends most of the small intestine is the

.a mesentery proper

b. transverse mesentery

c. lesser omentum

d. greater omentum

A

The passageway between the oral cavity and the pharynx is the

a. uvula

b. fauces

c. palatoglossal arch

d. palatopharyngeal arch

B

The ventral mesentery

a. becomes the main attachment point for digestive organs in the peritoneal cavity in the adult

b. is highly glandular, but not vascular

c. contains and forms a pathway for the hepatic portal vein and its tributaries

d. none of the above

D

Which of the following does not apply to the entire small intestine?

a. it is the primary site of digestion and the absorption of approximately 80 percent of nutrients

b. it averages 6 meters in length

c. it is retroperitoneal

d. it has a series of transverse folds called circular folds

C

In elderly individuals, the function of the digestive tract

a. changes in ways that parallel age-related changes of most other systems of the body

b. is independent of the changes that occur in other systems

c. can be determined by a study of liver function

d. improves in efficiency, but not in the rate of digestion

A

How would damage or removal of parts of the mesentery interfere with normal function of the small intestine?

a. it would cause an increase in peristalsis

b. hormone secretion would increase

c. the blood and nerve supply would suffer interference

d. the intestines would lose some of their motility

C