Question 1

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

Accepted Answer

They act as immune cells, phagocytizing foreign substances and defending against bacteria and viruses.

Question 2

A patient presents with a burn that is red, painful, and does not blister. Which layer(s) of the skin are most likely affected, and what type of burn is this?

Accepted Answer

Epidermis only; first degree burn

Question 3

Which of the following statements about melanocytes is TRUE?

Accepted Answer

Melanocytes produce melanin, which absorbs and filters UV light.

Question 4

A wound that extends into the dermis and results in scar tissue formation is most likely to undergo which of the following processes?

Accepted Answer

Deep wound healing, involving inflammation, migration, proliferation, and maturation phases

Question 5

Which of the following best explains why third degree burns are often painless in the affected area?

Accepted Answer

The burn destroys all nerve endings in the affected area.

Question 6

A patient has a burn covering the entire anterior chest and the entire left arm. According to the Rule of Nines, what percentage of the body surface area is affected?

Accepted Answer

$$9\% + 18\% = 27\%$$

Question 7

Which of the following layers of the epidermis is responsible for the initiation of keratinization?

Accepted Answer

Stratum granulosum

Question 8

A patient develops a scar that extends beyond the boundaries of the original wound into surrounding normal tissue. What is this type of scar called?

Accepted Answer

Keloid scar

Question 9

Which of the following is a function of the hypodermis?

Accepted Answer

Storage of lipids and insulation

Question 10

Which of the following best describes the difference between excretion and secretion in the context of the integumentary system?

Accepted Answer

Excretion is the removal of waste products, while secretion is the release of useful materials.

Question 11

Which of the following accessory structures is composed of dead, keratinized cells and is only found in thin skin?

Accepted Answer

Hair

Question 12

A patient presents with a new, irregularly shaped, multicolored skin lesion that has changed in size over the past month. Which of the following criteria for recognizing skin cancer does this scenario best illustrate?

Accepted Answer

E: Evolving

Question 13

Which of the following statements about the papillary layer of the dermis is CORRECT?

Accepted Answer

It forms dermal papillae that contribute to fingerprints.

Question 14

Which of the following best explains why the stratum corneum is an effective barrier to water loss?

Accepted Answer

It is composed of dead, keratin-filled cells that are tightly packed.

Question 15

Which of the following glands is responsible for producing a substance that lubricates and waterproofs the skin and hair?

Accepted Answer

Sebaceous glands

Question 16

A patient with a third degree burn is at greatest risk for which of the following complications?

Accepted Answer

Fluid and electrolyte imbalance

Question 17

Which of the following statements about skin cancer is TRUE?

Accepted Answer

Melanoma originates in melanocytes and is the most likely to metastasize.

Question 18

Which of the following best describes the process that occurs when the stratum basale is destroyed in a deep wound?

Accepted Answer

A skin graft is required because regeneration is not possible.

Question 19

Which of the following is a distinguishing feature of thick skin compared to thin skin?

Accepted Answer

Thick skin is found on the palms and soles and contains a stratum lucidum.

Question 20

A patient has a wound that is healing with the formation of granulation tissue and new blood vessels. Which phase of deep wound healing is this?

Accepted Answer

Migratory phase

The Integumentary System: Structure, Function, and Clinical Aspects

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