Question 1

Which of the following is NOT a primary function of the integumentary system?

Accepted Answer

Production of red blood cells

Question 2

A patient presents with a burn that damages the epidermis and the upper dermis. Which skin layers and tissues are affected?

Accepted Answer

Epidermis and dermis

Question 3

Which cell type is primarily responsible for the synthesis of new bone matrix?

Accepted Answer

Osteoblasts

Question 4

The stratum basale of the epidermis is best described as:

Accepted Answer

A layer containing actively dividing cells

Question 5

Which of the following best describes the function of the arrector pili muscle?

Accepted Answer

Contracts to cause hair to stand upright, producing 'goosebumps'

Question 6

Which exocrine gland is most active during emotional stress and is found mainly in the axillary and genital regions?

Accepted Answer

Apocrine gland

Question 7

A long bone's diaphysis is primarily composed of which type of bone tissue?

Accepted Answer

Compact bone

Question 8

Which hormone increases blood calcium levels by stimulating osteoclast activity?

Accepted Answer

Parathyroid hormone

Question 9

During endochondral ossification, which sequence correctly describes the transformation of tissue?

Accepted Answer

Cartilage is replaced by bone tissue

Question 10

Which structure in compact bone contains blood vessels and nerves and is surrounded by concentric lamellae?

Accepted Answer

Central (Haversian) canal

Question 11

A patient with a deficiency in Vitamin D is likely to experience which effect on their skeletal system?

Accepted Answer

Decreased calcium absorption and weakened bones

Question 12

Which of the following is a function of the muscular system that directly contributes to maintaining body temperature?

Accepted Answer

Generating heat

Question 13

The sarcomere is defined as:

Accepted Answer

The region between two Z lines

Question 14

Which event occurs first in the excitation-contraction mechanism of skeletal muscle?

Accepted Answer

Binding of acetylcholine to receptors on the sarcolemma

Question 15

If a muscle cell's sarcoplasmic reticulum fails to release calcium ions, which process will be directly impaired?

Accepted Answer

Formation of actin-myosin cross-bridges

Question 16

Which formula best represents the relationship between force ($$F$$), mass ($$m$$), and acceleration ($$a) in $$muscle contraction?

Accepted Answer

$$F = m 	imes a$$

Question 17

A motor unit consists of:

Accepted Answer

All muscle fibers innervated by a single motor neuron

Question 18

Which of the following best explains the sliding filament theory?

Accepted Answer

Actin filaments slide past myosin filaments, shortening the sarcomere

Question 19

Which neurotransmitter is released at the neuromuscular junction to initiate muscle contraction?

Accepted Answer

Acetylcholine

Question 20

A patient with hyperparathyroidism is likely to experience which effect on their bones?

Accepted Answer

Decreased bone density due to excessive osteoclast activity

Study Notes: Skin and Body Membranes, The Skeletal System, and The Muscular System

Study Guide - Practice Questions