Question 1

Which of the following best describes the anatomical position used as a reference in human anatomy?

Accepted Answer

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

Question 2

A patient presents with a deep laceration on the anterior surface of the forearm. Which of the following best describes the location of the injury using anatomical directional terms?

Accepted Answer

On the front side of the forearm, closer to the surface of the body

Question 3

Which of the following is a primary function of melanin in the skin?

Accepted Answer

Protecting underlying tissues from ultraviolet (UV) radiation

Question 4

A patient suffers a compound fracture of the femur. Which of the following best describes this injury?

Accepted Answer

A broken bone that pierces the skin, increasing risk of infection

Question 5

Which of the following best explains why the epidermis is avascular?

Accepted Answer

It lacks blood vessels and relies on diffusion from the underlying dermis for nutrients

Question 6

Which of the following best describes the role of osteoclasts in bone remodeling?

Accepted Answer

They break down bone matrix, releasing calcium into the blood

Question 7

A patient is unable to abduct their arm at the shoulder joint. Which type of synovial joint movement is impaired?

Accepted Answer

Movement away from the midline of the body

Question 8

Which of the following best describes the function of the sodium-potassium pump ($$\mathrm{Na^+/K^+}$$ ATPase) in maintaining the resting membrane potential of a neuron?

Accepted Answer

It actively transports $$3\ \mathrm{Na^+}$$ ions out and $$2\ \mathrm{K^+}$$ ions into the cell, maintaining the negative resting potential

Question 9

Which of the following is a characteristic of a third-degree burn?

Accepted Answer

It destroys the epidermis, dermis, and may affect deeper tissues, often resulting in loss of sensation

Question 10

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

Accepted Answer

Bone forms by replacing a hyaline cartilage model

Question 11

A patient has damage to the myelin sheath of peripheral nerves. Which of the following is a likely consequence?

Accepted Answer

Slower conduction of action potentials due to impaired saltatory conduction

Question 12

Which of the following best describes the function of the hypothalamus?

Accepted Answer

Regulating homeostatic functions such as hunger, thirst, body temperature, and hormone secretion

Question 13

Which of the following is true regarding the difference between white matter and gray matter in the central nervous system?

Accepted Answer

White matter consists mainly of myelinated axons, while gray matter contains neuron cell bodies and unmyelinated fibers

Question 14

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

Accepted Answer

Biceps brachii

Question 15

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

Accepted Answer

It stores and releases $$\mathrm{Ca$$^{2+}$$}$$ ions necessary for muscle contraction

Question 16

Which of the following best explains why a person with low dietary calcium may develop weakened bones?

Accepted Answer

Insufficient calcium impairs bone deposition, leading to decreased bone density

Question 17

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

Accepted Answer

Regulation of emotion, memory, and behavior

Question 18

Which of the following best describes the difference between the sympathetic and parasympathetic divisions of the autonomic nervous system?

Accepted Answer

The sympathetic division prepares the body for 'fight or flight,' while the parasympathetic division promotes 'rest and digest' activities

Question 19

Which of the following best describes the process of depolarization during an action potential?

Accepted Answer

The membrane potential becomes more positive due to the influx of $$\mathrm{Na^+}$$ ions

Question 20

A patient is unable to extend their leg at the knee joint. Which muscle is most likely affected?

Accepted Answer

Quadriceps femoris

Comprehensive Study Guidance for BIO 141: Anatomy and Physiology

Study Guide - Practice Questions

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