Question 1

Which of the following best describes the primary function of the cell membrane in human cells?

Accepted Answer

It regulates the movement of substances into and out of the cell, maintaining homeostasis.

Question 2

A patient presents with a burn that has damaged the epidermis and part of the dermis. Which system is primarily affected, and what is a key function of this system?

Accepted Answer

Integumentary system; acts as a barrier to protect against pathogens

Question 3

Which of the following best explains why bone is considered a dynamic tissue?

Accepted Answer

Bone tissue is constantly being remodeled through the actions of osteoblasts and osteoclasts.

Question 4

A patient is unable to voluntarily move their biceps brachii muscle. Which type of muscle tissue and physiological process is most likely impaired?

Accepted Answer

Skeletal muscle; excitation-contraction coupling

Question 5

Which of the following equations correctly represents the calculation of pH in a solution?

Accepted Answer

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

Question 6

A nerve cell is at rest with a membrane potential of $$-70\ \mathrm{mV}. $$Which of the following best describes the distribution of ions responsible for this resting potential?

Accepted Answer

Higher concentration of $$K^+$$ inside the cell and higher $$Na^+$$ outside the cell

Question 7

Which of the following best describes the role of the autonomic nervous system?

Accepted Answer

It regulates involuntary functions such as heart rate, digestion, and respiratory rate.

Question 8

A patient with osteoporosis has decreased bone density. Which chemical component of bone is most likely reduced, leading to this condition?

Accepted Answer

Hydroxyapatite (calcium phosphate)

Question 9

Which of the following is a correct sequence of events in the process of muscle contraction?

Accepted Answer

Calcium ions bind to troponin, tropomyosin shifts, myosin binds to actin, ATP hydrolysis powers the power stroke.

Question 10

A person touches a hot stove and quickly withdraws their hand. Which part of the nervous system is primarily responsible for this rapid response?

Accepted Answer

Central nervous system; integrating sensory input and initiating motor output

Question 11

Which of the following best describes the function of histology in anatomy and physiology?

Accepted Answer

The study of tissues and their organization in the body

Question 12

A patient is diagnosed with a disorder affecting the myelin sheath of peripheral nerves. Which system and function are most likely impaired?

Accepted Answer

Peripheral nervous system; rapid transmission of nerve impulses

Question 13

Which of the following is a key mechanism by which the body maintains homeostasis?

Accepted Answer

Negative feedback loops that counteract deviations from a set point

Question 14

A patient with a genetic mutation cannot produce collagen. Which tissue type would be most directly affected?

Accepted Answer

Connective tissue

Question 15

Which of the following best explains why the skeletal system is essential for calcium homeostasis?

Accepted Answer

Bones store calcium and release it into the bloodstream as needed.

Question 16

A patient is experiencing muscle weakness due to a lack of acetylcholine at the neuromuscular junction. Which step in muscle contraction is directly affected?

Accepted Answer

Initiation of the action potential in the muscle fiber

Question 17

Which of the following best describes the relationship between structure and function in anatomy and physiology?

Accepted Answer

The structure of a body part determines its function, and function can influence structure over time.

Question 18

A patient with a spinal cord injury loses sensation and movement below the injury site. Which two systems are most directly involved in this loss?

Accepted Answer

Nervous and muscular systems

Question 19

Which of the following best describes the process of facilitated diffusion across a cell membrane?

Accepted Answer

Movement of molecules from high to low concentration through a protein channel without using ATP

Question 20

A patient is unable to sweat, resulting in overheating during exercise. Which system is primarily affected, and what is the physiological consequence?

Accepted Answer

Integumentary system; impaired thermoregulation

Syllabus and Course Structure: Human Anatomy and Physiology I (NUR 0012)

Study Guide - Practice Questions

Study Guide - Flashcards