Question 1

Which of the following best describes the relationship between anatomy and physiology?

Accepted Answer

Anatomy is the study of the structure of body parts, while physiology is the study of how those parts function.

Question 2

A patient is experiencing muscle cramps due to an electrolyte imbalance. Which of the following best explains why maintaining homeostasis is important in this scenario?

Accepted Answer

Homeostasis maintains stable internal conditions, such as electrolyte levels, which are necessary for proper muscle function.

Question 3

Which of the following is an example of a positive feedback loop in the human body?

Accepted Answer

The release of oxytocin during childbirth, which intensifies uterine contractions.

Question 4

A solution contains 10 grams of NaCl dissolved in 100 mL of water. What is the percent concentration of NaCl in this solution? Use the formula $$	ext{Percent concentration} = \frac{	ext{mass of solute}}{	ext{volume of solution}} 	imes 100.$$

Accepted Answer

$$10\%$$

Question 5

Which of the following best describes a covalent bond?

Accepted Answer

A bond formed when two atoms share one or more pairs of electrons.

Question 6

Which of the following statements about enzymes is correct?

Accepted Answer

Enzymes lower the activation energy required for a chemical reaction to occur.

Question 7

A red blood cell is placed in a hypotonic solution. What will happen to the cell, and why?

Accepted Answer

The cell will swell and may burst because water moves into the cell by osmosis.

Question 8

Which of the following best describes the function of the rough endoplasmic reticulum (RER)?

Accepted Answer

Synthesis and modification of proteins that are to be secreted or inserted into membranes.

Question 9

During which phase of mitosis do the chromosomes align along the center of the cell?

Accepted Answer

Metaphase

Question 10

Which of the following is a function of epithelial tissue?

Accepted Answer

Protection, secretion, and absorption.

Question 11

A patient has a genetic mutation that prevents the formation of gap junctions in cardiac muscle. Which of the following would most likely result?

Accepted Answer

Impaired electrical communication between cardiac muscle cells, leading to arrhythmias.

Question 12

Which of the following best describes the difference between DNA and RNA?

Accepted Answer

DNA contains deoxyribose sugar and is double-stranded, while RNA contains ribose sugar and is single-stranded.

Question 13

Which of the following best explains why buffers are important in the human body?

Accepted Answer

Buffers help maintain a stable pH by neutralizing excess acids or bases.

Question 14

Which of the following is a characteristic of connective tissue?

Accepted Answer

It contains cells, fibers, and ground substance.

Question 15

A patient is unable to produce sufficient ATP due to a mitochondrial disorder. Which cellular process would be most directly affected?

Accepted Answer

Active transport of ions across the plasma membrane.

Question 16

Which of the following best describes the function of lysosomes?

Accepted Answer

They contain digestive enzymes that break down waste materials and cellular debris.

Question 17

Which of the following is true about the sodium-potassium (Na$$^+-K$^+) $$ATPase pump?

Accepted Answer

It moves 3 Na$$^+$$ ions out of the cell and 2 K$$^+$$ ions into the cell, using ATP.

Question 18

Which of the following best describes the difference between exocytosis and endocytosis?

Accepted Answer

Exocytosis moves substances out of the cell, while endocytosis brings substances into the cell.

Question 19

Which of the following is a function of nervous tissue?

Accepted Answer

Transmission of electrical impulses for communication.

Question 20

A patient has a burn that destroys the cutaneous membrane but leaves the mucous and serous membranes intact. Which of the following is most likely affected?

Accepted Answer

The skin, which is the body's primary barrier against pathogens and dehydration.

Anatomy & Physiology: Foundational Concepts and Study Guide

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