$\text{Creatine phosphate} + \text{ADP} \rightarrow \text{Creatine} + \text{ATP}$

Question 1

Which of the following best describes the function of melanin in the skin?

Accepted Answer

Melanin absorbs ultraviolet (UV) radiation, protecting underlying tissues from DNA damage.

Question 2

A patient presents with a third-degree burn covering 18% of their body surface area. Using the Rule of Nines, which region is most likely affected?

Accepted Answer

The anterior trunk

Question 3

Which layer of the epidermis is primarily responsible for mitotic activity and regeneration of skin cells?

Accepted Answer

Stratum basale

Question 4

Which of the following is a difference between compact bone and spongy bone?

Accepted Answer

Compact bone is organized into osteons, while spongy bone contains trabeculae.

Question 5

A child is diagnosed with rickets, a disease caused by a deficiency in which vitamin, and what is the primary effect on bone tissue?

Accepted Answer

Vitamin D; poor mineralization of bone matrix

Question 6

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

Accepted Answer

Bone replaces a pre-existing hyaline cartilage model.

Question 7

Which hormone is primarily responsible for increasing blood calcium levels by stimulating osteoclast activity?

Accepted Answer

Parathyroid hormone (PTH)

Question 8

A patient with osteoporosis is at increased risk for fractures due to which of the following changes in bone tissue?

Accepted Answer

Decreased bone mass and deterioration of trabecular structure

Question 9

Which of the following is NOT a function of synovial fluid in a synovial joint?

Accepted Answer

Formation of bone matrix

Question 10

Which type of cartilage is most commonly found in the articular surfaces of synovial joints?

Accepted Answer

Hyaline cartilage

Question 11

During muscle contraction, which ion is released from the sarcoplasmic reticulum to initiate the process?

Accepted Answer

Calcium ($Ca^{2+}$)

Question 12

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

Accepted Answer

Acetylcholine binds to receptors on the muscle fiber, triggering an action potential.

Question 13

Which of the following correctly matches the muscle fiber type with its characteristic?

Accepted Answer

Type I fibers: slow-twitch, high endurance

Question 14

A patient is unable to produce sufficient ATP during intense exercise. Which metabolic pathway is most likely impaired?

Accepted Answer

Aerobic respiration

Question 15

Which equation correctly represents the breakdown of creatine phosphate to regenerate ATP in muscle cells?

Accepted Answer

$	ext{Creatine phosphate} + 	ext{ADP} ightarrow 	ext{Creatine} + 	ext{ATP}$

Question 16

Which of the following best describes the difference between isotonic and isometric muscle contractions?

Accepted Answer

Isotonic contractions involve a change in muscle length, while isometric contractions involve no change in muscle length.

Question 17

Which of the following is a correct sequence of events in the sliding filament theory of muscle contraction?

Accepted Answer

Calcium binds to troponin, tropomyosin shifts, myosin binds to actin, power stroke occurs.

Question 18

Which of the following is a function of the epiphyseal growth plate in long bones?

Accepted Answer

It allows for the longitudinal growth of bones during childhood and adolescence.

Question 19

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

Accepted Answer

Cartilage lacks a direct blood supply, limiting nutrient delivery and repair.

Question 20

A patient with rheumatoid arthritis experiences joint pain and swelling. Which of the following best describes the underlying cause?

Accepted Answer

Autoimmune inflammation of the synovial membrane

Anatomy & Physiology Study Guide: Skin, Bone, Joints, and Muscular Tissue

Study Guide - Practice Questions