Question 1

Which of the following correctly lists the layers of the epidermis in thick skin from deepest to most superficial?

Accepted Answer

Stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, stratum corneum

Question 2

A patient presents with a deep laceration that penetrates through the reticular layer of the dermis. Which tissue type is most likely to be damaged in this injury?

Accepted Answer

Dense irregular connective tissue

Question 3

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

Accepted Answer

It stores energy and insulates the body due to its adipose tissue content.

Question 4

A histological slide shows a gland associated with a hair follicle that secretes an oily substance. Which gland is being observed?

Accepted Answer

Sebaceous gland

Question 5

Which of the following structures is NOT found in the epidermis?

Accepted Answer

Blood vessels

Question 6

A burn patient has lost sensation and the ability to sweat in the affected area. Which layers and structures are most likely destroyed?

Accepted Answer

Epidermis, dermis, and associated nerve endings and sweat glands

Question 7

Which layer of the dermis is responsible for forming fingerprints due to its projections into the epidermis?

Accepted Answer

Papillary layer

Question 8

A biopsy of a sweat gland reveals a coiled tubular structure located deep in the dermis, opening into a hair follicle in the axillary region. Which type of gland is this?

Accepted Answer

Apocrine sweat gland

Question 9

Which of the following correctly matches the hair structure with its description?

Accepted Answer

Medulla: central core of the hair shaft

Question 10

A patient with a genetic disorder has a mutation affecting the stratum basale. Which of the following symptoms is most likely?

Accepted Answer

Impaired regeneration of the epidermis

Question 11

Which of the following best explains why the stratum lucidum is only found in thick skin?

Accepted Answer

It provides an extra layer of protection in areas subject to high abrasion, such as the palms and soles.

Question 12

A researcher is studying the composition of the hypodermis. Which of the following cell types would she expect to find in abundance?

Accepted Answer

Adipocytes

Question 13

If a medication is designed to target the stratum granulosum, which process is it most likely to affect?

Accepted Answer

Keratohyalin granule formation and keratinization

Question 14

A patient has a blocked sebaceous gland. What is the most likely clinical outcome?

Accepted Answer

Development of acne or a sebaceous cyst

Question 15

Which of the following equations best represents the relationship between the surface area ($$A) $$and volume ($$V) of a $$cube-shaped cell, and why is this relationship important for the skin's barrier function?

Accepted Answer

$$A = 6s^2$, V$$ = $$s^3$$; a higher surface area to volume ratio in epidermal cells enhances barrier efficiency.

Question 16

A person with a mutation that prevents the formation of keratin would most likely experience which of the following symptoms?

Accepted Answer

Fragile skin that is easily damaged and prone to dehydration

Question 17

Which of the following best describes the main difference between eccrine and apocrine sweat glands?

Accepted Answer

Eccrine glands secrete directly onto the skin surface, while apocrine glands secrete into hair follicles.

Question 18

A histological section of the scalp shows a structure with three concentric layers: medulla, cortex, and cuticle. What is the function of the cortex in this structure?

Accepted Answer

It provides strength and color to the hair.

Question 19

A patient with a genetic defect in the papillary layer of the dermis would most likely have which of the following symptoms?

Accepted Answer

Reduced tactile sensitivity and poorly formed fingerprints

Question 20

Which of the following best explains why the hypodermis is an important site for subcutaneous injections?

Accepted Answer

It contains abundant blood vessels and loose connective tissue, allowing for rapid absorption of medications.

The Integumentary System: Structure and Function

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