Question 1

Which of the following best describes the process illustrated in the first image, where small uncharged molecules move across the lipid bilayer from an area of high concentration to low concentration?

Accepted Answer

Simple diffusion

Question 2

In the second image, water moves across a semipermeable membrane. What is the primary driving force for this movement?

Accepted Answer

A concentration gradient of water

Question 3

Referencing the third image, which equation correctly represents the osmotic pressure ($$\Pi) $$generated by the glucose solution?

Accepted Answer

$$\Pi = iMRT$$

Question 4

A red blood cell is placed in a solution and swells until it bursts, as shown in the fourth image. What type of solution is the cell in?

Accepted Answer

Hypotonic

Question 5

Which of the following statements about the Na+/K+ ATPase pump (as shown in the fifth image) is correct?

Accepted Answer

It requires ATP to function.

Question 6

If the Na+/K+ ATPase pump is inhibited, what immediate effect would you expect on the membrane potential?

Accepted Answer

The gradients for Na+ and K+ would dissipate over time.

Question 7

Which of the following best describes secondary active transport, as illustrated in the seventh image?

Accepted Answer

It uses the energy stored in the Na+ gradient to move another substance against its gradient.

Question 8

A cell is placed in a hypertonic solution. Which direction will water move, and what will happen to the cell?

Accepted Answer

Water will move out of the cell, causing it to shrink.

Question 9

Which of the following is a property of carrier-mediated transport but NOT simple diffusion?

Accepted Answer

Saturability

Question 10

Which of the following best explains why K+ leak channels contribute more to the resting membrane potential than Na+ leak channels?

Accepted Answer

There are more K+ leak channels than Na+ leak channels.

Question 11

A patient is given an intravenous solution that is isotonic to their blood. What will happen to their red blood cells?

Accepted Answer

They will remain the same size.

Question 12

Which of the following is true regarding facilitated diffusion?

Accepted Answer

It requires a membrane protein to move substances down their gradient.

Question 13

Which of the following best describes the function of an antiporter, as shown in the eighth image?

Accepted Answer

It moves one substance down its gradient and another in the opposite direction.

Question 14

Which of the following factors would increase the rate of diffusion of a substance across a cell membrane?

Accepted Answer

Increasing membrane surface area

Question 15

A cell is placed in a solution with a higher concentration of nonpenetrating solute than inside the cell. What will happen to the cell?

Accepted Answer

Water will move out of the cell, causing it to shrink.

Question 16

Which of the following is NOT a characteristic of carrier-mediated transport?

Accepted Answer

Unlimited transport rate

Question 17

Which of the following best explains why hydrophobic molecules cross the plasma membrane more easily than hydrophilic molecules?

Accepted Answer

The lipid bilayer is hydrophobic.

Question 18

Which of the following scenarios best illustrates secondary active transport?

Accepted Answer

Glucose is transported into a cell using the energy from Na+ moving down its gradient.

Question 19

Which of the following would most likely occur if a cell's membrane became impermeable to K+ ions?

Accepted Answer

The resting membrane potential would become less negative.

Question 20

Which of the following is the best example of a real-life application of osmosis in medicine?

Accepted Answer

Administering a hypertonic saline solution to reduce cerebral edema.

Membrane Transport & Resting Potential: Study Notes for Anatomy & Physiology

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드