Deck 4: Membrane Transport

Question 1

If a red blood cell,which has an internal solute concentration of 280 mOsm,is placed in a solution of pure water (0 mOsm)________.

A) the cell is hypotonic compared to the environment and will quickly lose water
B) the cell is hypertonic compared to the environment and will quickly lose water
C) the cell is hypertonic compared to the environment and will quickly gain water
D) the cell is hypotonic compared to the environment and will quickly gain water

Answer 1

B

Question 2

When placed in isotonic solution,red blood cells will ________.

A) shrivel
B) neither swell nor shrivel
C) swell and eventually lyse
D) There is not enough information to answer the question.

Answer 2

B

Question 3

Which of the following conditions must be met if diffusion across a membrane is to occur?

A) A concentration gradient must be present, and the membrane can't be permeable to the substance being transported.
B) A concentration gradient must be present, and the membrane must be permeable to the substance that is to be transported.
C) The membrane must be permeable to the substance that is to be transported.
D) A concentration gradient must be present.

Answer 3

B

Question 4

Solution 1 has a solute concentration of 10 mOsm.Solution 2 has a solute concentration of 3 mOsm.Solution 3 has a solute concentration of 25 mOsm.Solution 4 has a solute concentration of 10 mOsm.Which of the solutions are isotonic?

A) solution 1 and solution 4
B) solution 2 and solution 4
C) solution 1 and solution 3
D) solution 3 and solution 4

Question 5

Given two aqueous solutions with different concentrations of solute,separated by a selectively permeable membrane (permeable to water,but not solute),water will move from the solution with ________ solute concentration to the solution with ________ solute concentration.

A) greater; lesser
B) lesser; greater
C) Water will not move between the two solutions.
D) There is not enough information to answer the question.

Question 6

Solution 1 has a solute concentration of 10 mOsm.Solution 2 has a solute concentration of 3 mOsm.Solution 3 has a solute concentration of 25 mOsm.Solution 1 is ________ to solution 2.

A) hypertonic
B) hypotonic
C) isotonic
D) There is not enough information to answer the question.

Question 7

Substances tend to move from areas of ________ concentration to areas of ________ concentration.

A) similar; higher
B) higher; lower
C) lower; higher
D) similar; lower

Question 8

At which temperature would the rate of diffusion of dye molecules be the lowest?

A) 25 degrees C
B) 10 degrees C
C) 95 degrees C
D) 5 degrees C

Question 9

Beaker 1 contains water at 23 degrees C.Beaker 2 contains water at 5 degrees C.Beaker 3 contains water at 95 degrees C.In which beaker will the rate of diffusion be greatest?

A) beaker 3
B) beaker 2
C) beaker 1
D) There is not enough information given to answer the question.

Question 10

When comparing the solute concentration of two solutions,the ________ solution has a lower solute concentration.

A) hypertonic
B) hypotonic
C) isotonic
D) solvent

Question 11

Solution 1 has a solute concentration of 10 mOsm.Solution 2 has a solute concentration of 3 mOsm.Solution 3 has a solute concentration of 25 mOsm.Solution 1 is ________ to solution 3.

A) hypotonic
B) hypertonic
C) isotonic
D) There is not enough information to answer the question.

Question 12

At which temperature would the rate of diffusion of dye molecules be the highest?

A) 95 degrees C
B) 5 degrees C
C) 25 degrees C
D) 10 degrees C

Question 13

Which of the following substances will most freely travel across the plasma membrane?

A) glucose
B) triglyceride
C) cholesterol
D) keratin

Question 14

________ transport requires the input of energy,whereas ________ transport does not.

A) Active; membrane
B) Passive; active
C) Active; passive
D) Membrane; passive

Question 15

A ________ is a substance that dissolves when added to a solvent.

A) molecule
B) buffer
C) solute
D) compound

Question 16

Beaker 1 contains water at 23 degrees C.Beaker 2 contains water at 5 degrees C.Beaker 3 contains water at 95 degrees C.A drop of the same blue dye was placed in each beaker.After 10 minutes,the dye in beaker 1 moved 10 mm from the origin,whereas the dye in beakers 2 and 3 moved 2 mm and 40 mm from the origin,respectively.Which of the following statements properly explains this observation?

A) The rate of diffusion does not change as temperature changes.
B) The rate of diffusion increases as temperature decreases.
C) The rate of diffusion decreases as temperature increases.
D) The rate of diffusion increases as temperature increases.

Question 17

When comparing the solute concentration of two solutions,the ________ solution has a higher solute concentration.

A) isotonic
B) hypotonic
C) hypertonic
D) solvent

Question 18

Which of the following statements explains the observation that dye diffuses more quickly as temperature increases?

A) Random motion of particles decreases as temperature increases.
B) Random motion of particles increases as temperature decreases.
C) Random motion of particles decreases as temperature decreases.
D) Random motion of particles increases as temperature increases.

Question 19

As temperature increases,the rate of diffusion of a solute will ________.

A) decrease
B) increase
C) remain the same
D) There is not enough information to answer the question.

Question 20

A membrane that allows some substances to travel across it while restricting the passage of others is ________.

A) selectively permeable
B) impermeable
C) hypotonic
D) freely permeable