80
P A R T 2
Chemotherapeutic agents
C H E C K Y O U R U N D E R S T A N D I N G
Answers to the questions in this chapter can be found in
Appendix A at the back of this book.
MULTIPLE CHOICE
Select the best answer to the following.
1.
The basic unit of human structure is:
a.
the mitochondria.
b.
the nucleus.
c.
the nucleolus.
d.
the cell.
2.
The cell membrane is composed of:
a.
a phospholipid structure.
b.
channels of protein.
c.
a cholesterol-based membrane.
d.
Golgi apparati.
3.
The saying, “One rotten apple can spoil the whole
barrel”, can be used to refer to the cell-degrading
properties of:
a.
calcium channels.
b.
lysosomes.
c.
histocompatibility receptors.
d.
nuclear spindles.
4.
The ribosomes are important sites for:
a.
digestion of nutrients.
b.
excretion of waste products.
c.
production of proteins.
d.
hormone receptors.
5.
A human cell placed in salty seawater will:
a.
burst from water entering the cell.
b.
shrivel and die from water leaving the cell.
c.
not be affected in any way.
d.
break apart from the salt effect.
6.
The sodium–potassium pump maintains a negative
charge on the cell membrane by:
a.
osmosis.
b.
diffusion.
c.
active transport.
d.
facilitated diffusion.
7.
All cells progress through basically the same cell
cycle, including:
a.
two phases.
b.
four active phases and a resting phase.
c.
three periods of rest and a splitting phase.
d.
four active phases.
MULTIPLE RESPONSE
Select all that apply.
1.
The amount of time that a cell takes to progress
through the cell cycle is determined by which of the
following?
a.
the acidity of the environment
b.
the genetic makeup of the cell
c.
the location of the cell in the body
d.
the number of ribosomes in the cell
e.
the cell response to contact inhibition
f.
the availability of nutrients and oxygen
2.
Some substances will pass into the human cell by
simple diffusion. Which of the following substances
diffuse into the cell?
a.
calcium
b.
nitrogen
c.
sodium
d.
carbon dioxide
e.
oxygen
f.
potassium
3.
Some substances require a channel or pore to enter
a cell membrane. Which of the following substances
use a channel to enter the cell?
a.
calcium
b.
urea
c.
fat-soluble vitamins
d.
sodium
e.
oxygen
f.
potassium
