Question 1

Which of the following best describes homeostasis?

Accepted Answer

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

Question 2

Which of the following is NOT an example of a negative feedback mechanism?

Accepted Answer

Release of oxytocin during childbirth.

Question 3

A long, thin chain of single sugars called monosaccharides would produce a ________.

Accepted Answer

Polysaccharide

Question 4

Which type of chemical bond is formed when electrons are lost or gained?

Accepted Answer

Ionic bond

Question 5

Which of the following best describes the function of enzymes in the body?

Accepted Answer

They lower the activation energy required for chemical reactions.

Question 6

Which equation correctly represents the dissociation of NaCl in water?

Accepted Answer

$$\mathrm{NaCl} \rightarrow \mathrm{Na^+} + \mathrm{Cl^-}$$

Question 7

Which of the following is a correct description of a buffer?

Accepted Answer

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

Question 8

Which of the following best explains why water is an excellent solvent for ionic compounds?

Accepted Answer

Water molecules are polar and can surround and separate ions.

Question 9

Which of the following is a correct formula for calculating pH?

Accepted Answer

$$\mathrm{pH} = -\log_{10}[\mathrm{H^+}]$$

Question 10

Which of the following statements about ATP is correct?

Accepted Answer

ATP stores energy in its phosphate bonds and releases it during hydrolysis.

Question 11

During glycolysis, glucose is converted into which molecule?

Accepted Answer

Pyruvate

Question 12

Which of the following best describes the fate of pyruvate when oxygen is insufficient?

Accepted Answer

Pyruvate is converted to lactate in the cytoplasm.

Question 13

Which of the following is a characteristic of a reversible chemical reaction?

Accepted Answer

The reaction can proceed in both forward and reverse directions.

Question 14

Which of the following best describes the role of DNA in cells?

Accepted Answer

DNA stores genetic information and directs protein synthesis.

Question 15

Which of the following is a function of the serous membranes in the ventral cavities?

Accepted Answer

They reduce friction between organs and body walls.

Question 16

Which of the following best describes the process of denaturation?

Accepted Answer

Loss of protein structure due to changes in temperature or pH.

Question 17

Which of the following is a distinguishing characteristic of lipids?

Accepted Answer

They are insoluble in water and serve as energy storage molecules.

Question 18

Which of the following best explains the difference between acids and bases?

Accepted Answer

Acids release $$\mathrm{H^+}$$ ions in solution, while bases accept $$\mathrm{H^+}$$ ions or release $$\mathrm{OH^-}$$ ions.

Question 19

Which of the following is a correct description of the anatomical position?

Accepted Answer

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

Question 20

Which of the following best describes the impact on ATP production if there is insufficient oxygen?

Accepted Answer

ATP production decreases because cells rely on anaerobic pathways, which are less efficient.

Unit 1 Exam Study Guide: Chapters 1-3 (Introduction to Anatomy & Physiology, Basic Chemistry, Cellular Respiration)

Study Guide - Practice Questions