Q: Which of the following is a correct formula for estimating the percentage of body surface area affected by burns using the 'rule of nines'?

$\text{Total Burn Area} = 9\% \times \text{Number of Sections Burned} + 1\% \text{(if genitals are affected)}$

Q: Which of the following is a correct equation for the synthesis of vitamin D in the skin?

$\text{7-dehydrocholesterol} + \text{UVB radiation} \rightarrow \text{cholecalciferol (vitamin D}_3\text{)}$

Question 1

Which of the following is NOT considered a component of the integumentary system?

Accepted Answer

Lymph nodes

Question 2

The hypodermis, also known as subcutaneous tissue, primarily consists of which type of tissue?

Accepted Answer

Adipose tissue

Question 3

Which layer of the skin is responsible for anchoring the skin to underlying muscles and acts as a shock absorber?

Accepted Answer

Hypodermis

Question 4

A patient presents with a burn that affects only the epidermis, causing redness and pain but no blisters. What degree of burn is this?

Accepted Answer

First-degree burn

Question 5

Which cell type in the epidermis is primarily responsible for producing the pigment that protects DNA from UV radiation?

Accepted Answer

Melanocytes

Question 6

Which layer of the epidermis contains a single row of mitotic stem cells and is responsible for generating new keratinocytes?

Accepted Answer

Stratum basale

Question 7

A surgeon makes an incision parallel to cleavage lines in the skin. What is the expected outcome compared to an incision made perpendicular to these lines?

Accepted Answer

Faster healing and less scarring

Question 8

Which of the following best describes the function of eccrine sweat glands?

Accepted Answer

Regulate body temperature through thermoregulation

Question 9

A patient with jaundice presents with yellowing of the skin. Which underlying organ dysfunction is most likely responsible?

Accepted Answer

Liver

Question 10

Which of the following is a correct formula for estimating the percentage of body surface area affected by burns using the 'rule of nines'?

Accepted Answer

$	ext{Total Burn Area} = 9\% 	imes 	ext{Number of Sections Burned} + 1\% 	ext{(if genitals are affected)}$

Question 11

Which epidermal layer is present only in thick skin, such as the palms and soles?

Accepted Answer

Stratum lucidum

Question 12

Which of the following skin cancers is most likely to metastasize and is highly resistant to chemotherapy?

Accepted Answer

Melanoma

Question 13

Which of the following is a function of the acid mantle of the skin?

Accepted Answer

Chemical barrier against pathogens

Question 14

A patient presents with silvery-white scars on the abdomen after rapid weight gain. What is the most likely cause?

Accepted Answer

Dermal tears resulting in striae (stretch marks)

Question 15

Which of the following best describes the role of dendritic cells in the epidermis?

Accepted Answer

Provide immune defense against pathogens

Question 16

Which skin structure is responsible for deep pressure sensation?

Accepted Answer

Lamellar (Pacinian) corpuscle

Question 17

Which of the following is a correct equation for the synthesis of vitamin D in the skin?

Accepted Answer

$	ext{7-dehydrocholesterol} + 	ext{UVB radiation} ightarrow 	ext{cholecalciferol (vitamin D}_3	ext{)}$

Question 18

Which of the following best explains why third-degree burns are typically painless?

Accepted Answer

Destruction of nerve endings in the affected area

Question 19

Which pigment is responsible for the pink tint seen in light skin due to its presence in blood and visibility through the skin?

Accepted Answer

Hemoglobin

Question 20

Which of the following glands is responsible for secreting an oily substance that lubricates skin and hair and has antibacterial properties?

Accepted Answer

Sebaceous gland

Chapter 5: The Integumentary System – Structure and Function

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