Question 1

Which layer of the epidermis is only present in thick skin, such as the palms of the hands and soles of the feet?

Accepted Answer

Stratum lucidum

Question 2

A patient presents with a deep cut that penetrates through the epidermis and into the dermis. Which tissue type is primarily affected in the dermis?

Accepted Answer

Dense irregular connective tissue

Question 3

Which cell type in the epidermis is responsible for producing the pigment melanin?

Accepted Answer

Melanocytes

Question 4

If a person has a genetic defect that prevents the formation of desmosomes in the epidermis, which function would be most compromised?

Accepted Answer

Cell-to-cell adhesion and structural integrity

Question 5

Which of the following structures is NOT found in thin (hairy) skin but IS present in thick (hairless) skin?

Accepted Answer

Stratum lucidum

Question 6

A burn patient loses the entire epidermis and part of the dermis. Which layer is most responsible for shock absorption and insulation beneath the skin?

Accepted Answer

Hypodermis (subcutaneous layer)

Question 7

Which of the following best describes the function of Langerhans cells in the epidermis?

Accepted Answer

Activation of the immune system

Question 8

A patient is experiencing excessive oiliness of the skin. Which gland is most likely overactive?

Accepted Answer

Sebaceous gland

Question 9

Which layer of the skin contains the majority of blood vessels and nerve endings?

Accepted Answer

Dermis

Question 10

A person is unable to sense light touch on their skin. Which cell type in the epidermis is most likely dysfunctional?

Accepted Answer

Merkel cells

Question 11

Which of the following equations correctly represents the relationship between the surface area ($A$) and volume ($V$) of the skin, assuming the skin covers a cylindrical limb of radius $r$ and length $h$?

Accepted Answer

$V = \pi r^2 h$

Question 12

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

Accepted Answer

Papillary layer

Question 13

A patient with a mutation in keratin protein would most likely have issues with which function of the skin?

Accepted Answer

Waterproofing and protection

Question 14

Which of the following is TRUE regarding the hypodermis (subcutaneous layer)?

Accepted Answer

It contains adipose tissue that absorbs shock and insulates

Question 15

Which structure is responsible for the growth of hair?

Accepted Answer

Hair follicle

Question 16

A person with damage to the reticular layer of the dermis would most likely experience which symptom?

Accepted Answer

Reduced skin strength and elasticity

Question 17

Which of the following best explains why thick skin does not contain hair follicles?

Accepted Answer

Thick skin is adapted for high friction and protection

Question 18

Which of the following is a function of the integumentary system?

Accepted Answer

Protection against mechanical injury and pathogens

Question 19

If the sweat glands in the skin are blocked, which physiological process would be most affected?

Accepted Answer

Regulation of body temperature

Question 20

Which equation best represents the rate of heat loss ($Q$) through the skin, given the skin's surface area ($A$), temperature difference ($\Delta T$), and thermal conductivity ($k$)?

Accepted Answer

$Q = k A \Delta T$

The Integumentary System: Structure and Function of Skin

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