Chapter 20:
Nutrition and Digestion
Practice Test
1.
Fingerlike projections called _____ help to increase the surface area of the small intestine.
a.
blood vessels
b.
lymph vessels
c.
gills
d.
villi
Hint
2.
In which organ of the digestive system in humans is chemical digestion completed?
a.
esophagus
b.
gallbladder
c.
small intestine
d.
stomach
Hint
3.
What is digestion that takes place inside a cell?
a.
peristalsis
b.
absorption
c.
extracellular digestion
d.
intracellular digestion
Hint
4.
Which of these is NOT found in an earthworm's digestive system?
a.
pharynx
b.
gizzard
c.
crop
d.
collar cell
Hint
5.
Hydra has only one body opening which takes in food and eliminates wastes. What area used for digestion does this opening lead to?
a.
anus
b.
crop
c.
gastrovascular cavity
d.
gizzard
Hint
6.
What mineral in your diet is necessary for the formation of bones and teeth?
a.
phosphorus
b.
calcium
c.
sodium
d.
iron
Hint
7.
In what organ of an earthworm's digestive system do muscular contractions grind food into smaller particles?
a.
intestine
b.
crop
c.
pharynx
d.
gizzard
Hint
8.
What is the opening in a one-way digestive system where wastes are expelled?
a.
gizzard
b.
crop
c.
anus
d.
mouth
Hint
9.
Which of these is a complex molecule that must be broken down by digestion?
a.
water
b.
vitamins
c.
proteins
d.
minerals
Hint
10.
What is digestion that takes place within a cavity inside an organism, or outside the organism entirely?
a.
extracellular digestion
b.
intracellular digestion
c.
peristalsis
d.
absorption
Hint
