Question 1

Which of the following best describes the difference between mass and weight in the context of anatomy and physiology?

Accepted Answer

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Question 2

Which four elements make up the majority of the human body's mass?

Accepted Answer

Carbon, hydrogen, oxygen, and nitrogen

Question 3

Which subatomic particle determines the atomic number of an element?

Accepted Answer

Proton

Question 4

A radioactive isotope of carbon has 6 protons and 8 neutrons. What is its atomic mass?

Accepted Answer

$$14$$

Question 5

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

Accepted Answer

Covalent bond

Question 6

Which factor would most likely increase the rate of a chemical reaction in the human body?

Accepted Answer

Increasing temperature

Question 7

Which statement best explains the role of enzymes in biochemical reactions?

Accepted Answer

Enzymes lower the activation energy required for reactions to occur.

Question 8

Which of the following is a correct comparison between DNA and RNA?

Accepted Answer

DNA stores genetic information, while RNA helps express genetic information.

Question 9

Which process is responsible for the breakdown of complex organic molecules into simpler ones by adding water?

Accepted Answer

Hydrolysis

Question 10

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

Accepted Answer

Active transport of ions across membranes

Question 11

Which of the following best describes the function of lipids in the human body?

Accepted Answer

Insulate organs, build cell membranes, and provide stored energy

Question 12

Which of the following is NOT a property of water that makes it vital for homeostasis?

Accepted Answer

It acts as a nonpolar solvent for lipids.

Question 13

Which equation correctly represents the formation of ATP from ADP and inorganic phosphate?

Accepted Answer

$$\mathrm{ADP} + \mathrm{P_i} \rightarrow \mathrm{ATP}$$

Question 14

Which of the following best describes dehydration synthesis?

Accepted Answer

It joins two molecules by removing a water molecule.

Question 15

Which type of bond is responsible for the unique properties of water, such as high surface tension?

Accepted Answer

Hydrogen bond

Question 16

A solution has a pH of 3. Which of the following statements is true?

Accepted Answer

The solution is acidic and has a high concentration of $$\mathrm{H^+}$$ ions.

Question 17

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

Accepted Answer

A buffer resists changes in pH by accepting or donating $$\mathrm{H^+}$$ ions.

Question 18

Which of the following best explains why proteins are considered the body's basic structural material?

Accepted Answer

Proteins form the framework for tissues and organs and perform many vital functions.

Question 19

Which of the following is a correct statement about carbohydrates in the human body?

Accepted Answer

Carbohydrates provide an easily used energy source for the body.

Question 20

A patient is experiencing muscle weakness due to a lack of sodium ions. Which type of chemical bond is most relevant to the movement of sodium ions across cell membranes?

Accepted Answer

Ionic bond

Fundamental Concepts of Matter, Energy, and Biochemistry in Anatomy & Physiology

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