Lab: Diffusion Across a Semi-permeable Membrane Answers

0 verified answers1 views
2
Free Preview

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.
3

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.
6

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.
7

Which homeostatic process moves particles against a concentration gradient?

A
dynamic equilibrium
B
passive transport
C
osmosis
D
active transport
8

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.
9

For diffusion to occur, which condition must be met?

A
A concentration gradient must exist.
B
A hypotonic external environment must exist.
C
A hypertonic external environment must exist.
D
Dynamic equilibrium must exist.
10

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

Did you find these answers helpful?

Lab: Diffusion Across a Semi-permeable Membrane…