AnswersHSBIO Biology Sem 1 26-27The Function of Organelles

Cell Homeostasis Answers

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3

Which statement describes the ability of the cell membrane to allow various substance to move through it?

A
The cell membrane is selectively permeable.
B
The cell membrane is composed of lipids and phosphates.
C
The cell membrane is both hydrophilic and hydrophobic.
D
The cell membrane is a bilayer structure.
4

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
6

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.
7

How does the contractile vacuole in a single-celled organism function to maintain homeostasis?

A
It pumps water into the cell.
B
It pumps water out of the cell.
C
It pumps solutes into the cell.
D
It pumps solutes out of the cell.
9

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

A
active transport
B
passive transport
C
dynamic equilibrium
D
osmosis
10

Which best describes the difference between osmosis and diffusion?

A
Osmosis is the movement of particles from a high to a low particle concentration, while diffusion is the movement of water from a high to a low water concentration.
B
Diffusion is the movement of particles from a high to low particle concentration, while osmosis is the movement of water from a high to a low water concentration.
C
Diffusion is the movement of particles from a low to a high particle concentration, while osmosis is the movement of water from a low to a high water concentration.
D
Osmosis is the movement of particles from a low to a high particle concentration, while diffusion is the movement of water from a low to a high water concentration.

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