Question 1

A patient is given an intravenous solution that is hypotonic relative to their red blood cells. What is the most likely outcome for the red blood cells, and which process is primarily responsible?

Accepted Answer

They will burst due to water entering by osmosis.

Question 2

Which of the following best describes the function of the sodium-potassium pump in maintaining cellular homeostasis?

Accepted Answer

It uses ATP to move sodium ions out of the cell and potassium ions into the cell, maintaining concentration gradients.

Question 3

A researcher observes that a cell is unable to synthesize proteins. Which organelle is most likely malfunctioning, and what is its primary role?

Accepted Answer

Ribosome; translating mRNA into proteins

Question 4

Which of the following scenarios best illustrates facilitated diffusion?

Accepted Answer

Glucose moving into a cell through a specific carrier protein from high to low concentration

Question 5

During phagocytosis, which sequence of events occurs as a white blood cell engulfs a bacterium?

Accepted Answer

The bacterium is engulfed, a vesicle forms, the vesicle fuses with lysosomes, and digestive enzymes break down the bacterium.

Question 6

Which of the following statements about membrane potential is correct?

Accepted Answer

Membrane potential is created by the unequal distribution of ions across the plasma membrane.

Question 7

A cell is placed in a solution with a higher concentration of solutes than inside the cell. What will happen to the cell, and what is the process called?

Accepted Answer

The cell will shrink due to osmosis.

Question 8

Which of the following best explains why ATP is required for vesicular transport but not for simple diffusion?

Accepted Answer

Vesicular transport moves substances against their concentration gradient, requiring energy input.

Question 9

Which of the following equations best represents the relationship between concentration gradient and passive transport rate?

Accepted Answer

$$J = -D \, \frac{dC}{dx}$$

Question 10

A cell is unable to maintain its resting membrane potential. Which of the following is the most likely cause?

Accepted Answer

Failure of the sodium-potassium pump

Question 11

Which of the following is a real-life example of exocytosis?

Accepted Answer

Release of insulin from pancreatic cells into the bloodstream

Question 12

Which of the following best describes the role of the rough endoplasmic reticulum (ER)?

Accepted Answer

It synthesizes proteins due to the presence of ribosomes on its surface.

Question 13

A scientist observes that a cell is unable to store calcium ions. Which organelle is most likely malfunctioning?

Accepted Answer

Smooth endoplasmic reticulum

Question 14

Which of the following statements about aquaporins is correct?

Accepted Answer

Aquaporins are protein channels that facilitate the movement of water across the cell membrane.

Question 15

Which process is most directly responsible for the movement of oxygen from the lungs into the bloodstream?

Accepted Answer

Simple diffusion

Question 16

A cell is observed to have a large number of mitochondria. What can you infer about the cell's function?

Accepted Answer

It requires a large amount of energy for its activities.

Question 17

Which of the following best explains why rewriting notes in your own words can improve memory retention?

Accepted Answer

It engages multiple senses and clarifies messy initial notes, reinforcing memory.

Question 18

Which of the following is NOT a function of lysosomes?

Accepted Answer

Synthesizing proteins from amino acids

Question 19

Which of the following best describes the process of receptor-mediated endocytosis?

Accepted Answer

A cell engulfs specific substances after they bind to receptors on the cell surface.

Question 20

Which of the following best explains why the direction of the concentration gradient is important in passive transport?

Accepted Answer

Substances move from areas of high concentration to low concentration, and movement does not occur if the membrane is not permeable.

Cell Biology: Membrane Transport, Organelles, and Protein Synthesis – Study Notes for Anatomy & Physiology

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