Question 1

Which of the following best describes the function of negative feedback in homeostatic regulation?

Accepted Answer

It opposes changes by initiating responses that restore balance to a set point.

Question 2

A patient is experiencing dehydration, leading to increased blood osmolarity. Which organ system is primarily responsible for regulating water balance in this scenario?

Accepted Answer

Urinary system

Question 3

Which of the following best represents the correct order of levels of organization in the human body, from simplest to most complex?

Accepted Answer

Chemical → Cell → Tissue → Organ → Organ system → Organism

Question 4

A person inhales cold air, causing their body temperature to drop. Which of the following is an example of a negative feedback response to this situation?

Accepted Answer

Shivering to generate heat and restore normal body temperature

Question 5

Which anatomical plane divides the body into anterior and posterior portions?

Accepted Answer

Coronal (frontal) plane

Question 6

A solution has a hydrogen ion concentration of $1 	imes 10^{-8}$ M. What is the pH of this solution?

Accepted Answer

$pH = 8$

Question 7

Which of the following best describes the function of buffers in body fluids?

Accepted Answer

Buffers maintain pH stability by removing or releasing $H^+$ ions as needed.

Question 8

Which of the following is a property of water that makes it essential for life?

Accepted Answer

Water participates in chemical reactions such as hydrolysis and dehydration synthesis.

Question 9

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

Accepted Answer

It will swell and possibly burst as water enters the cell.

Question 10

Which of the following best describes the role of enzymes in metabolism?

Accepted Answer

Enzymes act as biological catalysts, lowering activation energy and speeding up reactions.

Question 11

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

Accepted Answer

It regulates the exchange of materials between the cell and its environment.

Question 12

Which organelle is responsible for synthesizing proteins that are exported from the cell?

Accepted Answer

Ribosomes on rough endoplasmic reticulum

Question 13

A patient has a genetic disorder that affects the function of their mitochondria. Which cellular process is most likely to be impaired?

Accepted Answer

ATP production through aerobic respiration

Question 14

Which of the following best describes facilitated diffusion?

Accepted Answer

Movement of molecules from high to low concentration using carrier proteins, no ATP required

Question 15

Which of the following best describes the function of the Golgi apparatus?

Accepted Answer

Packages proteins for secretion and forms lysosomes

Question 16

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

Accepted Answer

S phase

Question 17

Which of the following best describes the relationship between DNA and RNA in protein synthesis?

Accepted Answer

RNA carries genetic code from DNA to ribosomes for protein synthesis.

Question 18

A patient is unable to produce sufficient insulin due to destruction of pancreatic beta cells. Which organ system is primarily affected?

Accepted Answer

Endocrine system

Question 19

Which of the following is an example of a covalent bond?

Accepted Answer

Bond between hydrogen and oxygen in a water molecule

Question 20

Which of the following best describes the anatomical position?

Accepted Answer

Standing upright, arms at the sides, palms facing forward

Anatomy & Physiology: Foundations, Organization, and Cellular Function

Study Guide - Practice Questions

Study Guide - Flashcards