$$\text{Skin weight} = 0.07 \times \text{Total body weight}$$

Question 1

Which layer of the skin is primarily responsible for synthesizing vitamin D when exposed to UV radiation?

Accepted Answer

Epidermis

Question 2

A patient presents with a deep cut that penetrates past the dermis but does not reach muscle tissue. Which layer is most likely affected?

Accepted Answer

Hypodermis

Question 3

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

Accepted Answer

Melanocytes

Question 4

The stratum spinosum of the epidermis contains cells that are part of the immune system. What are these cells called?

Accepted Answer

Langerhans cells

Question 5

Which of the following best describes the function of the hypodermis?

Accepted Answer

Stores fat and anchors skin to underlying structures

Question 6

A tattoo artist deposits ink into the skin. Which layer must the ink reach to ensure the tattoo is permanent?

Accepted Answer

Dermis

Question 7

Which structure is responsible for the formation of friction ridges, such as fingerprints?

Accepted Answer

Dermal papillae

Question 8

A person with a genetic defect in keratin production would most likely have problems with which skin function?

Accepted Answer

Protection against abrasion and penetration

Question 9

Which gland is associated with hair follicles and secretes an oily substance that lubricates hair and skin?

Accepted Answer

Sebaceous gland

Question 10

If a person’s skin appears yellowish after eating large amounts of carrots and tomatoes, which pigment is most likely responsible?

Accepted Answer

Carotene

Question 11

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

Accepted Answer

Stratum lucidum

Question 12

A patient with a burn that destroys the epidermis and dermis but leaves the hypodermis intact will most likely experience which of the following?

Accepted Answer

Loss of sensation due to nerve damage

Question 13

Which of the following best explains why the skin is considered an organ?

Accepted Answer

It performs multiple functions and contains several tissue types

Question 14

Which formula best represents the percentage of body weight that is skin, given that skin is the largest organ?

Accepted Answer

$$	ext{Skin weight} = 0.07 	imes 	ext{Total body weight}$$

Question 15

Which of the following is a correct sequence of layers from superficial to deep in the skin?

Accepted Answer

Epidermis, Dermis, Hypodermis, Deep fascia

Question 16

Which type of sweat gland is most numerous and plays a key role in thermoregulation?

Accepted Answer

Eccrine sweat gland

Question 17

A person with a mutation affecting the function of Langerhans cells would most likely have which problem?

Accepted Answer

Impaired immune response in the skin

Question 18

Which structure contracts to cause 'goosebumps' in response to cold or emotional stimuli?

Accepted Answer

Arrector pili muscle

Question 19

If a person’s skin appears pale due to low oxygen levels, which pigment is most responsible for this change?

Accepted Answer

Hemoglobin

Question 20

Which of the following best describes the process of laser tattoo removal?

Accepted Answer

Laser breaks up ink particles, which are then cleared by dermal macrophages

Integumentary System: Structure and Function (EXS 111 Study Notes)

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