Unit 4:
Homeostasis: The Body in Balance
Practice Test
1.
What part of a bird's egg is a cell?
a.
the albumen
b.
the egg white
c.
the yolk
d.
the entire egg
Hint
2.
What is the random motion of atoms and molecules that takes place in all substances?
a.
active transport
b.
diffusion
c.
conduction
d.
convection
Hint
3.
In the human digestive system, absorption of most nutrients into the body occurs in which organ?
a.
large intestine
b.
stomach
c.
small intestine
d.
mouth
Hint
4.
What is the process by which water moves across a cell membrane?
a.
active transport
b.
conduction
c.
convection
d.
osmosis
Hint
5.
What organ in humans and other animals maintains homeostasis by adjusting the amount of water and dissolved substances in the extracellular fluid?
a.
liver
b.
heart
c.
lung
d.
kidney
Hint
6.
What type of cell is the immune system's primary defense against antigens?
a.
bacteria cells
b.
viruses
c.
red blood cells
d.
white blood cells
Hint
7.
What happens in the alveoli?
a.
osmosis
b.
filtering toxins out of the blood
c.
pumping blood into the aorta
d.
gas exchange
Hint
8.
What is an external boundary surrounding ALL cells?
a.
cell wall
b.
shell
c.
cell membrane
d.
nuclear membrane
Hint
9.
Where is protein produced in the cell?
a.
in vacuoles
b.
on ribosomes
c.
in chloroplasts
d.
on the cell membrane
Hint
10.
Which organelle within a plant or animal cell is known a powerhouse within the cell?
a.
vacuole
b.
nucleus
c.
Golgi apparatus
d.
mitochondrion
Hint
