Q: If a person weighs 200 pounds and their skin accounts for 15% of their body weight, how many pounds of skin do they have? Use the formula $$\text{Skin weight} = \text{Total weight} \times \text{Percentage as decimal}.$$

$$200 \times 0.15 = 30$$ pounds

Question 1

Which of the following is NOT considered an appendage of the skin in the integumentary system?

Accepted Answer

Muscle tissue

Question 2

If a person weighs 200 pounds and their skin accounts for 15% of their body weight, how many pounds of skin do they have? Use the formula $$	ext{Skin weight} = 	ext{Total weight} 	imes 	ext{Percentage as decimal}.$$

Accepted Answer

$$200 	imes 0.15 = 30$$ pounds

Question 3

Which layer of the skin is avascular and primarily composed of epithelial cells?

Accepted Answer

Epidermis

Question 4

A patient presents with a wound that only affects the stratum corneum. Which statement best describes the affected cells?

Accepted Answer

The cells are dead, highly keratinized, and continuously shed.

Question 5

Which cell type in the epidermis is responsible for producing a pigment that protects against UV radiation?

Accepted Answer

Melanocytes

Question 6

Which layer of the epidermis contains stem cells that rapidly undergo mitosis to produce new keratinocytes?

Accepted Answer

Stratum basale

Question 7

A genetic condition called CIPA results in an inability to feel pain or heat. Why is this condition potentially deadly?

Accepted Answer

Individuals cannot sense injuries or dangerous temperatures, leading to unnoticed harm.

Question 8

Which structure in the dermis is responsible for creating fingerprints?

Accepted Answer

Dermal papillae

Question 9

Which layer of the skin is NOT considered part of the skin but is important for insulation and shock absorption?

Accepted Answer

Hypodermis (subcutaneous tissue)

Question 10

Which of the following best describes the function of keratin produced by keratinocytes?

Accepted Answer

It helps the skin remain waterproof and protects against abrasion.

Question 11

Which layer of the dermis is responsible for most of its thickness and strength?

Accepted Answer

Reticular layer

Question 12

Which sensory receptor in the skin is specialized for detecting heavy pressure and vibrations?

Accepted Answer

Pacinian corpuscles

Question 13

Which of the following statements about melanocytes is TRUE?

Accepted Answer

They produce melanin and are only found in the stratum basale.

Question 14

Which of the following is the correct order of the layers of the epidermis from deepest to most superficial?

Accepted Answer

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

Question 15

Which cell type in the epidermis is formed in the bone marrow and migrates to the stratum spinosum to activate the immune system?

Accepted Answer

Langerhans cells (dendritic cells)

Question 16

A patient develops a callus on their hand due to repeated friction. Which process is most responsible for this adaptation?

Accepted Answer

Increased production of keratinocytes in the stratum basale

Question 17

Which structure delivers oxygen and nutrients to the skin and removes carbon dioxide and waste?

Accepted Answer

Blood vessels

Question 18

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

Accepted Answer

Stratum lucidum

Question 19

Which of the following best describes the function of adipose tissue in the hypodermis?

Accepted Answer

It absorbs shock and insulates heat.

Question 20

Which of the following is TRUE regarding the stratum granulosum?

Accepted Answer

Keratinocytes begin producing keratohyalin granules and release lipids to waterproof the skin.

Integumentary System Basics: Structure and Function

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