Question 1

Which of the following best describes the concept of homeostasis in human physiology?

Accepted Answer

The process by which the body maintains a stable internal environment despite changes in external conditions.

Question 2

A patient presents with a blood pH of 7.1. Which of the following best describes their condition?

Accepted Answer

Acidosis

Question 3

Which of the following body planes divides the body into right and left halves?

Accepted Answer

Sagittal plane

Question 4

Which of the following is NOT a survival need for humans?

Accepted Answer

Vitamin D

Question 5

A solution contains 0.1 mol of NaCl dissolved in 1 L of water. What is the molarity ($$M) of $$the solution?

$$M = \frac{	ext{moles of solute}}{	ext{liters of solution}}$$

Accepted Answer

$$M = 0.1$$

Question 6

Which of the following cell organelles is primarily responsible for ATP production?

Accepted Answer

Mitochondrion

Question 7

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

Accepted Answer

Metaphase

Question 8

Which type of chemical bond involves the sharing of electron pairs between atoms?

Accepted Answer

Covalent bond

Question 9

A patient is experiencing rapid loss of water from their cells due to a hypertonic intravenous solution. Which membrane transport process is primarily responsible for this effect?

Accepted Answer

Osmosis

Question 10

Which of the following tissues is specialized for electrical impulse conduction?

Accepted Answer

Nervous tissue

Question 11

Which cell structure is responsible for packaging and modifying proteins for secretion?

Accepted Answer

Golgi apparatus

Question 12

Which of the following is a function of the cytoskeleton?

Accepted Answer

Providing structural support and facilitating cell movement

Question 13

Which of the following best describes positive feedback in physiological systems?

Accepted Answer

A process that amplifies the original stimulus, leading to an enhanced response.

Question 14

Which of the following is NOT a component of the cell membrane?

Accepted Answer

Microtubules

Question 15

Which tissue type lines the inside of blood vessels and the heart?

Accepted Answer

Simple squamous epithelium

Question 16

Which of the following is a major element found in the human body and is essential for oxygen transport in blood?

Accepted Answer

Iron

Question 17

Which of the following junctions allows direct passage of ions and small molecules between adjacent cells?

Accepted Answer

Gap junction

Question 18

Which phase of the cell cycle is characterized by DNA replication?

Accepted Answer

S phase

Question 19

A patient with a genetic mutation affecting collagen production would most likely have problems with which tissue type?

Accepted Answer

Connective tissue

Question 20

Which of the following best explains why enzymes increase the rate of chemical reactions in the body?

$$	ext{Enzyme action:} \quad E + S ightarrow ES ightarrow E + P$$

Accepted Answer

Enzymes lower the activation energy, allowing reactions to proceed faster.

Foundations of Anatomy & Physiology: Chapters 1-4 Study Guide

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