Question 1

Which of the following best describes the location of sodium ions ($$\mathrm{Na^+}) $$under normal physiological conditions?

Accepted Answer

Primarily in the extracellular fluid

Question 2

Potassium ions ($$\mathrm{K^+}) $$are most abundant in which compartment of the body?

Accepted Answer

Intracellular fluid

Question 3

The sodium-potassium pump moves ions against their concentration gradients. Which of the following correctly describes the movement of ions by this pump?

Accepted Answer

3 $$\mathrm{Na^+}$$ out, 2 $$\mathrm{K^+} in$$

Question 4

Which process involves the cell engulfing liquid droplets to form vesicles filled with fluid?

Accepted Answer

Pinocytosis

Question 5

A cell is observed to form vesicles filled with extracellular fluid. Which cellular process is most likely occurring?

Accepted Answer

Pinocytosis

Question 6

Which of the following statements about pinocytosis is TRUE?

Accepted Answer

It requires ATP to occur

Question 7

During which phase of the cell cycle does DNA replication occur?

Accepted Answer

S phase

Question 8

A researcher observes a cell preparing for division, but no visible chromosomes are present and DNA is loosely arranged. Which phase is the cell most likely in?

Accepted Answer

G2 phase

Question 9

Which of the following best describes the main event of the S phase in the cell cycle?

Accepted Answer

DNA replication

Question 10

A patient is diagnosed with a defect in the sodium-potassium pump. Which of the following consequences is most likely to occur?

Accepted Answer

Increased intracellular $$\mathrm{Na^+}$$ and decreased intracellular $$\mathrm{K^+}$$

Question 11

Which of the following is NOT a function of the sodium-potassium pump?

Accepted Answer

Facilitating passive diffusion of ions

Question 12

Which phase of the cell cycle is primarily responsible for cell growth and preparation for DNA synthesis?

Accepted Answer

G1 phase

Question 13

A cell is observed to be actively synthesizing proteins and growing, but has not yet begun DNA replication. Which phase is it in?

Accepted Answer

G1 phase

Question 14

Which of the following processes requires energy in the form of ATP?

Accepted Answer

Pinocytosis

Question 15

A cell is exposed to a toxin that inhibits ATP production. Which process will be most directly affected?

Accepted Answer

Pinocytosis

Question 16

Which of the following best explains why the sodium-potassium pump is considered an example of active transport?

Accepted Answer

It requires energy from ATP to move ions against their concentration gradients

Question 17

During which phase of the cell cycle does the cell prepare for mitosis by continuing to grow and making final preparations?

Accepted Answer

G2 phase

Question 18

Which of the following is a key difference between pinocytosis and phagocytosis?

Accepted Answer

Pinocytosis engulfs liquids, phagocytosis engulfs solid particles

Question 19

A scientist observes vesicles containing fluid inside a cell. Which process most likely formed these vesicles?

Accepted Answer

Pinocytosis

Cellular Transport and the Cell Cycle: Study Notes for Anatomy & Physiology

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