Question 1

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

Accepted Answer

Homeostasis is the process by which the body maintains a constant internal environment despite changes in external conditions.

Question 2

A patient is found to have a blood pH of 7.1. Which of the following best describes this condition?

Accepted Answer

The patient is experiencing acidosis, as normal blood pH is between 7.35 and 7.45.

Question 3

Which of the following correctly lists the levels of organization in the human body from simplest to most complex?

Accepted Answer

Chemical, cellular, tissue, organ, organ system, organism

Question 4

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes of an element have the same number of protons but different numbers of neutrons.

Question 5

A solution has a hydrogen ion concentration of $1 	imes 10^{-4}$ M. What is the pH of this solution?

Accepted Answer

$4$

Question 6

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

Accepted Answer

Covalent bonds involve the sharing of electrons between atoms, while ionic bonds involve the transfer of electrons from one atom to another.

Question 7

Which organelle is primarily responsible for producing ATP through cellular respiration?

Accepted Answer

Mitochondrion

Question 8

A cell is placed in a hypotonic solution. What will most likely happen to the cell?

Accepted Answer

Water will enter the cell, causing it to swell and possibly burst.

Question 9

Which of the following best describes the function of enzymes in chemical reactions?

Accepted Answer

Enzymes lower the activation energy required for a reaction to occur, increasing the reaction rate.

Question 10

Which of the following is a correct example of a negative feedback mechanism in the human body?

Accepted Answer

Regulation of blood glucose levels by insulin and glucagon

Question 11

Which of the following statements about the plasma membrane is correct?

Accepted Answer

The plasma membrane is composed of a phospholipid bilayer with embedded proteins.

Question 12

Which of the following best describes the anatomical position?

Accepted Answer

Standing upright, facing forward, arms at the sides with palms facing forward

Question 13

Which of the following is a function of the cytoskeleton in eukaryotic cells?

Accepted Answer

Providing structural support and facilitating movement of organelles

Question 14

Which of the following best describes the difference between facilitated diffusion and active transport?

Accepted Answer

Facilitated diffusion moves substances down their concentration gradient without energy input, while active transport moves substances against their concentration gradient using energy.

Question 15

Which of the following is a correct description of a buffer in biological systems?

Accepted Answer

A buffer resists changes in pH by neutralizing added acids or bases.

Question 16

Which of the following is a correct example of a polysaccharide and its function?

Accepted Answer

Glycogen, which serves as energy storage in animals

Question 17

Which of the following best describes the process of transcription in protein synthesis?

Accepted Answer

Transcription is the process by which mRNA is synthesized from a DNA template.

Question 18

A patient is diagnosed with a genetic disorder affecting the lysosomal enzymes. Which cellular process is most likely impaired?

Accepted Answer

Intracellular digestion of macromolecules

Question 19

Which of the following best describes the difference between cytosol and extracellular fluid?

Accepted Answer

Cytosol is the fluid inside the cell, while extracellular fluid is the fluid outside the cell.

Anatomy & Physiology: Foundational Concepts and Core Principles

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