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Multiple Choice Feedback Quiz
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1

Your body needs fats to
A)construct cell membranes.
B)insulate nervous tissue.
C)provide energy.
D)do all of the above
2

Night blindness can be caused by the lack of which vitamin in the diet?
A)A
B)B1
C)B12
D)C
3

Enzymes that break up carbohydrates into sugars are called
A)proteases.
B)amylases.
C)lipases.
D)buffers.
4

Digestion takes place in each of the following organs except
A)mouth.
B)stomach.
C)small intestine.
D)large intestine.
5

What connects the pharynx to the stomach?
A)trachea
B)epiglottis
C)esophagus
D)pyloric sphincter
6

The unraveling of proteins in preparation for digestion takes place in the
A)mouth.
B)stomach.
C)small intestine.
D)large intestine.
7

The primary digestive organ of the digestive system is the
A)mouth.
B)stomach.
C)liver.
D)small intestine.
8

All of the following are absorbed into the blood from the stomach except
A)water
B)aspirin
C)alcohol
D)proteins
9

Proteins are broken into long fragments in the stomach by the action of
A)HCl.
B)pepsinogen.
C)pepsin.
D)gastrin.
10

The pancreas is responsible for the production of
A)digestive enzymes.
B)bicarbonate.
C)insulin.
D)all of the above
11

The liver produces bile salts that aid in the digestion of
A)fats.
B)proteins.
C)carbohydrates.
D)sugars.
12

Sodium and vitamin K are reabsorbed through the walls of the
A)stomach.
B)duodenum.
C)ileum.
D)large intestine.
13

The organ of the body that turns sugars, amino acids, and fatty acids into substances that are used by the different cells of the body is the
A)liver
B)small intestine
C)large intestine
D)pancreas
14

When blood sugar is low, what is released into the bloodstream to cause the liver to increase the breakdown of glycogen into glucose?
A)glucagon
B)insulin
C)adrenaline
D)a and c only
15

Which of the following is(are) (a) function(s) of the kidneys?
A)The kidneys remove harmful substances from the body.
B)The kidneys recapture water for use by the body.
C)The kidneys regulate the levels of salt in the blood.
D)All of the above are functions of the kidneys.
16

Fats contain approximately twice as many calories per gram as do carbohydrates.
A)true
B)false
17

Low-fiber diets, such as are now common in the United States, appear to be associated with an increase in the occurrence of colon cancer.
A)true
B)false
18

The essential amino acids are synthesized by the body.
A)true
B)false
19

A deficiency of vitamin D causes scurvy.
A)true
B)false
20

Cobalt, zinc, and selenium are vitamins required in a healthy diet.
A)true
B)false
21

Mammals have lost the ability to synthesize vitamin C and therefore must include it in their diets.
A)true
B)false
22

The primary cause of ulcers is the overproduction of gastrin.
A)true
B)false
23

Urea is the by-product of the removal of an amino group from the metabolism of amino acids.
A)true
B)false
24

The walls of the capillaries near the loop of Henle allow smaller molecules, like urea, to pass out of the blood.
A)true
B)false
25

Tubular excretion uses active transport to excrete uric acid and ammonia into the urine.
A)true
B)false





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