Question 1

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

Accepted Answer

Enzymes lower the activation energy, thereby speeding up chemical reactions.

Question 2

A patient is experiencing muscle fatigue during intense exercise. Which metabolic pathway is primarily responsible for ATP generation under these anaerobic conditions?

Accepted Answer

Glycolysis

Question 3

Which of the following is NOT a function of the plasma membrane?

Accepted Answer

Synthesis of ATP from glucose

Question 4

A hormone is released from the hypothalamus and stimulates the anterior pituitary to secrete another hormone. This is an example of which type of feedback loop?

Accepted Answer

Hierarchical endocrine signaling

Question 5

Which equation correctly represents the relationship between energy, work, and heat in cellular metabolism?

Accepted Answer

$$E_{total} = W + Q$$

Question 6

Which of the following best explains why oxygen is required for aerobic metabolism?

Accepted Answer

Oxygen acts as the final electron acceptor in the electron transport chain.

Question 7

A patient with a deficiency in calcium homeostasis is most likely to experience which of the following symptoms?

Accepted Answer

Muscle spasms and tetany

Question 8

Which of the following statements about bulk transport is correct?

Accepted Answer

Bulk transport requires energy and is used for moving large particles across the membrane.

Question 9

Which of the following is a correct statement about homeostasis?

Accepted Answer

Homeostasis refers to the maintenance of a constant internal environment.

Question 10

A person is exposed to cold temperatures. Which physiological response is most likely to occur to maintain homeostasis?

Accepted Answer

Shivering to generate heat

Question 11

Which of the following best describes the difference between steroid and peptide hormones?

Accepted Answer

Steroid hormones are derived from cholesterol, while peptide hormones are made of amino acids.

Question 12

Which of the following is a correct formula for calculating Body Mass Index (BMI)?

Accepted Answer

$$BMI = \frac{weight\ (kg)}{$$height^2$$\ (m^2$)}$$

Question 13

Which of the following is a function of the hypothalamus in endocrine regulation?

Accepted Answer

Releasing hormones that control the pituitary gland

Question 14

A patient is found to have elevated blood glucose levels. Which hormone is most likely deficient?

Accepted Answer

Insulin

Question 15

Which of the following best describes the function of the sodium-potassium pump?

Accepted Answer

It uses ATP to move sodium out of the cell and potassium into the cell.

Question 16

Which of the following is a correct statement about negative feedback in homeostatic mechanisms?

Accepted Answer

Negative feedback opposes changes to restore equilibrium.

Question 17

Which of the following is the fastest source of energy for muscle contraction during a sprint?

Accepted Answer

Glycogen breakdown

Question 18

A patient is unable to maintain blood calcium levels. Which organ is most likely malfunctioning?

Accepted Answer

Parathyroid gland

Question 19

Which of the following is a correct formula for calculating the rate of diffusion across a membrane?

Accepted Answer

$$Rate = \frac{(C_1$ - C_2$) 	imes A 	imes P}{d}$$

Question 20

Which of the following is a correct statement about the sympathetic nervous system?

Accepted Answer

It increases heart rate and mobilizes energy stores.

Fundamentals of Physiology and Homeostatic Mechanisms: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards