Question 1

Which cell type in the epidermis is primarily responsible for producing the protein that waterproofs and protects the skin?

Accepted Answer

Keratinocytes

Question 2

What is the main function of melanin in the skin, and which cells produce it?

Accepted Answer

Melanin protects against UV radiation and is produced by melanocytes.

Question 3

A person develops a suntan after prolonged sun exposure. Which process best explains this phenomenon?

Accepted Answer

Melanocytes produce more melanin to protect against UV rays.

Question 4

Which layer of the epidermis is responsible for producing new cells via mitosis?

Accepted Answer

Stratum Basale

Question 5

What is the primary function of the stratum corneum?

Accepted Answer

Provides protection and waterproofs the skin

Question 6

Which structure forms fingerprints and is created during fetal development?

Accepted Answer

Friction ridges

Question 7

What is the main tissue type found in the papillary dermis?

Accepted Answer

Areolar connective tissue

Question 8

Which layer of the dermis contains the cutaneous plexus and forms tension (cleavage) lines?

Accepted Answer

Reticular dermis

Question 9

What is the function of the hypodermis?

Accepted Answer

Anchors skin to underlying tissues, stores fat, and provides insulation and shock absorption

Question 10

Which accessory structure is responsible for causing goosebumps?

Accepted Answer

Arrector pili muscle

Question 11

What is the primary function of sebaceous glands?

Accepted Answer

Secrete sebum to lubricate and waterproof the skin and hair

Question 12

Which gland uses merocrine secretion and is distributed widely across the body for thermoregulation?

Accepted Answer

Eccrine sudoriferous gland

Question 13

What is the specific function of Meissner’s corpuscles?

Accepted Answer

Detect light touch and texture

Question 14

Which structure is shown in the image with concentric rings and is responsible for detecting deep pressure and vibration?

Accepted Answer

Lamellar (Pacinian) corpuscle

Question 15

A patient presents with deep creases on their palms and fingers that facilitate movement. What are these lines called?

Accepted Answer

Flexure lines

Question 16

Which layer of the epidermis is only visible in thick skin and contains keratinohyaline granules?

Accepted Answer

Stratum Lucidum

Question 17

What is the main structural difference between eccrine and apocrine sudoriferous glands?

Accepted Answer

Eccrine glands use merocrine secretion, apocrine glands use apocrine secretion.

Question 18

Which cell type in the epidermis functions as an immune cell and is made in the bone marrow?

Accepted Answer

Dendritic (Langerhans) cells

Question 19

A histological slide shows a structure with multiple layers of cells, some containing keratohyalin granules. Which layer is this?

Accepted Answer

Stratum Granulosum

Question 20

Which equation best represents the relationship between the thickness of the stratum corneum ($$T_{SC}) $$and the number of cell layers ($$N_{CL}) if $$each cell layer is $$d$$ micrometers thick?

Accepted Answer

$$T_{SC} = N_{CL} 	imes d$$

The Integumentary System: Structure, Function, and Accessory Organs

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