Q: Which of the following best describes the role of the sodium-potassium pump in maintaining cellular homeostasis?

It moves 3 Na\textsuperscript{+} out of the cell and 2 K\textsuperscript{+} into the cell, using ATP.

Q: A solution has a pH of 5. Which of the following statements is correct regarding its properties?

It is acidic and has a high concentration of H\textsuperscript{+}.

Question 1

A patient receives an intravenous (IV) solution that is hypertonic relative to their red blood cells. What is the most likely effect on the red blood cells, and why?

Accepted Answer

The cells will shrink because water leaves the cells to balance the higher solute concentration outside.

Question 2

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

Accepted Answer

It moves 3 Na	extsuperscript{+} out of the cell and 2 K	extsuperscript{+} into the cell, using ATP.

Question 3

A scientist observes a cell with a large number of mitochondria. Which function is this cell most likely specialized for?

Accepted Answer

Energy production through ATP synthesis

Question 4

Which of the following chemical reactions represents a decomposition reaction, and what is its significance in the human body?

Accepted Answer

$$AB \rightarrow A + B$$; it is important for breaking down nutrients to release energy.

Question 5

A cell is placed in a solution and begins to swell. Which term best describes the solution, and what is the direction of water movement?

Accepted Answer

Hypotonic; water moves into the cell.

Question 6

Which of the following best explains why facilitated diffusion is necessary for glucose transport across the plasma membrane?

Accepted Answer

Glucose is a large, polar molecule and requires a membrane protein to move down its concentration gradient.

Question 7

Which organelle is responsible for modifying, packaging, and shipping proteins, and what is the correct sequence for a protein destined for exocytosis?

Accepted Answer

Golgi apparatus; Ribosome $$\rightarrow$$ Rough ER $$\rightarrow$$ Golgi $$\rightarrow$$ Plasma membrane $$\rightarrow$$ Exocytosis

Question 8

A solution has a pH of 5. Which of the following statements is correct regarding its properties?

Accepted Answer

It is acidic and has a high concentration of H	extsuperscript{+}.

Question 9

Which of the following best describes the structure and function of the plasma membrane?

Accepted Answer

It is a phospholipid bilayer with embedded proteins, cholesterol, and carbohydrates, and is selectively permeable.

Question 10

Which of the following is a correct pairing of a macromolecule with its building block and primary function?

Accepted Answer

Carbohydrate; monosaccharide; quick energy

Question 11

A person is exposed to a toxin that inhibits the function of ribosomes. Which cellular process would be most directly affected?

Accepted Answer

Protein synthesis

Question 12

Which of the following best describes the difference between ionic and covalent bonds?

Accepted Answer

Ionic bonds involve transferring electrons; covalent bonds involve sharing electrons.

Question 13

During which phase of mitosis do chromosomes line up in the middle of the cell, and what is the significance of this arrangement?

Accepted Answer

Metaphase; ensures chromosomes are evenly divided between daughter cells

Question 14

Which of the following best describes the process of osmosis?

Accepted Answer

Movement of water from low solute concentration to high solute concentration across a selectively permeable membrane

Question 15

Which of the following is a function of cholesterol in the plasma membrane?

Accepted Answer

It stabilizes membrane fluidity and structure.

Question 16

A cell needs to bring in large solid particles, such as bacteria. Which process will it use, and what is this process called?

Accepted Answer

Phagocytosis; the cell engulfs the particles into vesicles.

Question 17

Which of the following best explains why ATP is essential for active transport?

Accepted Answer

Active transport moves substances against their concentration gradient, which requires energy from ATP.

Question 18

Which of the following correctly matches a body plane with the structures it divides?

Accepted Answer

Frontal (coronal); divides the body into anterior and posterior parts

Question 19

Which of the following best describes the role of negative feedback in homeostasis?

Accepted Answer

It reverses the original change to maintain a stable internal environment.

Question 20

Which of the following is the correct sequence of events in a homeostatic control mechanism?

Accepted Answer

Receptor $$\rightarrow$$ Control Center $$\rightarrow$$ Effector

Anatomy & Physiology Study Guide: Chapters 1.5, 2, and 3

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드