$$\text{Percentage} = \frac{\text{Weight of skin}}{\text{Total body weight}} \times 100$$

$$1.5 \ \text{mm} \leq \text{Thickness} \leq 4.4 \ \text{mm}$$

$$\text{Water lost} = \text{Sweat rate} \times \text{Time}$$

Question 1

Which of the following is NOT a primary function of the skin?

Accepted Answer

Production of red blood cells

Question 2

The hypodermis is primarily composed of which types of tissue?

Accepted Answer

Areolar and adipose connective tissue

Question 3

A patient presents with a burn that has blisters but heals with little scarring. Which type of burn is this most likely to be?

Accepted Answer

Second-degree burn

Question 4

Which pigment is responsible for the yellow-orange coloration in skin, and is obtained from foods like carrots and tomatoes?

Accepted Answer

Carotene

Question 5

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

Accepted Answer

Epidermis

Question 6

Which of the following best describes the function of sebum produced by sebaceous glands?

Accepted Answer

It softens and lubricates hair and skin

Question 7

Which type of sweat gland is most numerous and produces 'true sweat'?

Accepted Answer

Eccrine gland

Question 8

A patient has a rapidly changing, irregularly bordered, dark mole. Which skin cancer is most likely?

Accepted Answer

Melanoma

Question 9

Which layer of the skin anchors it to underlying structures and helps insulate the body?

Accepted Answer

Hypodermis

Question 10

Which of the following is a correct formula for calculating the percentage of body weight accounted for by skin?

Accepted Answer

$$	ext{Percentage} = \frac{	ext{Weight of skin}}{	ext{Total body weight}} 	imes 100$$

Question 11

Which of the following is TRUE regarding the development of skin layers during embryogenesis?

Accepted Answer

The dermis and hypodermis develop from mesoderm

Question 12

Which of the following is a function of the capillary network in the skin?

Accepted Answer

Regulation of heat loss

Question 13

Which of the following best describes the structure of a hair?

Accepted Answer

It consists of a root embedded in the skin and a shaft projecting above the surface

Question 14

Which type of skin cancer arises from keratinocytes of the stratum spinosum?

Accepted Answer

Squamous cell carcinoma

Question 15

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

Accepted Answer

Epidermis, dermis, hypodermis

Question 16

Which of the following is a correct formula for calculating the thickness range of skin?

Accepted Answer

$$1.5 \ 	ext{mm} \leq 	ext{Thickness} \leq 4.4 \ 	ext{mm}$$

Question 17

Which of the following is TRUE about the distribution of hypodermis in males and females?

Accepted Answer

It differs between males and females

Question 18

Which of the following is a function of the sensory receptors found in the skin?

Accepted Answer

Detection of environmental stimuli

Question 19

Which of the following is TRUE about the healing process of third-degree burns?

Accepted Answer

They consume the full thickness of the skin

Question 20

Which of the following is a correct formula for calculating the amount of water lost through sweat?

Accepted Answer

$$	ext{Water lost} = 	ext{Sweat rate} 	imes 	ext{Time}$$

The Integumentary System: Structure and Functions of Skin

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