AnswersFirst Semester BiologyAnimal and Plant Cells

Cell Homeostasis Answers

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1
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Which best describes dynamic equilibrium?

A
There is a difference in concentration on either side of the cell membrane.
B
There is an uneven distribution of particles inside and outside the cell.
C
Particles are moving into and out of the cell, but their concentrations remain stable.
D
A concentration gradient is forcing water out of the cell and particles into the cell.
2
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What would most likely happen to a unicellular organism if it was exposed to a hypotonic solution for an extended period of time?

A
It would shrivel and shrink.
B
It would swell but never burst.
C
It would swell and then burst.
D
It would not be affected.
3

Which adaptation helps polar bears maintain a constant internal temperature (thermal homeostasis) in cold weather?

A
three layers of fur
B
blubber
C
finding shade underground
D
white skin
4

Which homeostatic process requires energy to move particles across the plasma membrane?

A
active transport
B
passive transport
C
dynamic equilibrium
D
osmosis
5

Which movement of particles would be most affected by a disorder that causes damage to carrier proteins?

A
osmosis
B
passive transport
C
active transport
D
diffusion
6

In which kind of solution is the concentration of solutes the same inside and outside of the cell?

A
isotonic
B
hypertonic
C
hypotonic
D
concentrated
7

Which motion of particles across a membrane requires energy?

A
from high concentration to low concentration
B
from low concentration to high concentration
C
with no concentration gradient
D
through dynamic equilibrium

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