MULTIPLE CHOICE

1.The process by which food is broken down into absorbable components is called which of the following?

a.digestion

b.absorption

c.secretion

d.mastication

2.What is mastication?

a.the act of chewing

b.the act of swallowing

c.the wave-like contraction of the intestines

d.the wave-like contraction of the esophagus

3.Which of the following parts is the lumen of the GI tract?

a.the epiglottis

b.the capillaries

c.the inner space

d.the mucosal surface

4.In what organ does the digestion process begin?

a.mouth

b.stomach

c.duodenum

d.jejunum-ileum

5.What is umami?

a.the flavour of monosodium glutamate

b.the opening between the duodenum and jejunum

c.the intestinal enzyme that hydrolyzes fish proteins

d.an intestinal enzyme that hydrolyzes dietary nucleic acids

6.About how many more times sensitive is the sense of smell compared with the sense of taste?

a.2 times

b.10 times

c.100s of times

d.1000s of times

7.Which of the following is a basic taste sensation?

a.hot

b.cold

c.sugary

d.bitter

8.The food flavour enhancer monosodium glutamate is believed by some scientists to promote a unique taste sensation known by which of the following terms.

a.salinos

b.umami

c.chymos

d.glutami

9.Which of the following best describes the anatomy of the gastrointestinal tract?

a.a vat-like vessel

b.a rigid, solid tunnel

c.a flexible muscular tube

d.a firm, duct-like channel

10.Which of the following is a specific sphincter muscle?

a.longitudinal

b.cardiac

c.duodenal

d.diaphragmatic