$$\text{Stress} = \frac{\text{Force}}{\text{Area}}$$

$$\text{Cardiac Output} = \text{Stroke Volume} \times \text{Heart Rate}$$

$$\text{BMI} = \frac{\text{Weight (kg)}}{\text{Height (m)}^2}$$

Question 1

Which of the following best describes the function of osteoclasts in bone tissue?

Accepted Answer

They break down bone matrix, facilitating bone resorption.

Question 2

A patient presents with muscle weakness and delayed reflexes. Blood tests reveal low calcium levels. Which hormone is most likely underproduced?

Accepted Answer

Parathyroid hormone (PTH)

Question 3

Which of the following equations correctly represents the relationship between force, cross-sectional area, and stress in a muscle?

Accepted Answer

$$	ext{Stress} = \frac{	ext{Force}}{	ext{Area}}$$

Question 4

Which of the following best explains why cartilage heals more slowly than bone after injury?

Accepted Answer

Cartilage is avascular, limiting nutrient delivery and cell migration.

Question 5

A child is diagnosed with rickets, a disease characterized by soft, weak bones. Which vitamin deficiency is most likely responsible?

Accepted Answer

Vitamin D

Question 6

Which of the following statements about the sodium-potassium pump is correct?

Accepted Answer

It moves 3 sodium ions out of the cell and 2 potassium ions in, using ATP.

Question 7

Which of the following best describes the role of acetylcholine at the neuromuscular junction?

Accepted Answer

It stimulates muscle contraction by binding to receptors on the muscle cell membrane.

Question 8

A patient has damage to the myelin sheath of peripheral nerves. Which cell type is most likely affected?

Accepted Answer

Schwann cells

Question 9

Which of the following is the correct formula for calculating cardiac output?

Accepted Answer

$$	ext{Cardiac Output} = 	ext{Stroke Volume} 	imes 	ext{Heart Rate}$$

Question 10

Which of the following best describes the function of the sarcoplasmic reticulum in skeletal muscle?

Accepted Answer

It stores and releases calcium ions to trigger muscle contraction.

Question 11

A patient is unable to flex their forearm at the elbow. Which muscle is most likely impaired?

Accepted Answer

Biceps brachii

Question 12

Which of the following best describes the difference between compact bone and spongy bone?

Accepted Answer

Compact bone is dense and forms the outer layer of bones; spongy bone is porous and found at the ends of long bones.

Question 13

Which of the following equations correctly represents the calculation of body mass index (BMI)?

Accepted Answer

$$	ext{BMI} = \frac{	ext{Weight (kg)}}{	ext{Height (m)}^2}$$

Question 14

Which of the following best explains the role of the hypothalamus in thermoregulation?

Accepted Answer

It acts as the body's thermostat, detecting changes in temperature and initiating responses to maintain homeostasis.

Question 15

A patient has difficulty breathing due to paralysis of the diaphragm. Which cranial nerve is most likely affected?

Accepted Answer

Phrenic nerve

Question 16

Which of the following best describes the process of endochondral ossification?

Accepted Answer

Bone replaces a cartilage model during development.

Question 17

Which of the following is a function of the lymphatic system?

Accepted Answer

Returning excess interstitial fluid to the bloodstream

Question 18

Which of the following best describes the role of the sinoatrial (SA) node in the heart?

Accepted Answer

It initiates the electrical impulses that set the pace for the heartbeat.

Question 19

A patient is unable to distinguish between hot and cold objects with their skin. Which type of receptor is most likely damaged?

Accepted Answer

Thermoreceptors

Question 20

Which of the following best describes the function of the tricuspid valve in the heart?

Accepted Answer

It prevents backflow of blood from the right ventricle to the right atrium.

Lecture Final Exam Review

Study Guide - Practice Questions