Question 1

Which of the following structures is responsible for detecting deep pressure and vibration in the skin?

Accepted Answer

Lamellar corpuscle

Question 2

A patient presents with a loss of fine touch sensation in their fingertips. Which structure is most likely damaged?

Accepted Answer

Tactile corpuscle

Question 3

Which layer of the skin contains the majority of blood vessels and nerves supplying the skin?

Accepted Answer

Reticular layer of the dermis

Question 4

During a cold day, which structure contracts to cause 'goosebumps' on the skin?

Accepted Answer

Arrector pili muscle

Question 5

Which of the following is NOT considered a true part of the skin?

Accepted Answer

Subcutaneous layer (hypodermis)

Question 6

A burn that destroys both the epidermis and the entire dermis will most likely damage which of the following structures?

Accepted Answer

Lamellar corpuscle

Question 7

Which structure is primarily responsible for producing sebum, an oily substance that lubricates the skin and hair?

Accepted Answer

Sebaceous gland

Question 8

If a patient has a genetic disorder that prevents the formation of adipose tissue, which function of the skin would be most directly impaired?

Accepted Answer

Thermal insulation and energy storage

Question 9

Which of the following best describes the function of the dermal papillae?

Accepted Answer

They increase the surface area for exchange of gases, nutrients, and waste products between the dermis and epidermis.

Question 10

A person accidentally cuts their skin until they bleed. Which is the deepest layer that must have been penetrated?

Accepted Answer

Dermis

Question 11

Which of the following equations best represents the relationship between the thickness of the skin ($$t$$), the number of cell layers in the epidermis ($$n$$), and the average thickness of each cell layer ($$d$$)?

Accepted Answer

$$t = n 	imes d$$

Question 12

Which structure is most directly involved in the detection of hair movement?

Accepted Answer

Hair follicle receptor (root hair plexus)

Question 13

A patient with hyperhidrosis (excessive sweating) is most likely experiencing overactivity in which structure?

Accepted Answer

Eccrine sweat gland

Question 14

Which of the following best explains why the subcutaneous layer is important for drug injections?

Accepted Answer

It is highly vascularized, allowing rapid absorption of drugs into the bloodstream.

Question 15

If the dermal vascular plexus is damaged, which of the following skin functions would be most directly affected?

Accepted Answer

Thermoregulation and nutrient delivery

Question 16

Which of the following is the correct order of layers from the outermost to the innermost in the skin and subcutaneous tissue?

Accepted Answer

Epidermis → Dermis → Subcutaneous layer

Question 17

A patient with a blocked sweat pore is at increased risk for which of the following conditions?

Accepted Answer

Impaired thermoregulation

Question 18

Which structure is most likely to be found in the reticular layer of the dermis?

Accepted Answer

Lamellar corpuscle

Question 19

If the area of the skin ($$A) is$$ $$0.2\ m^2$ and the average density of sweat pores per cm^2$ is 100$, what is the total number of sweat pores on that area? (Recall: 1$$\ $$m^2 = 10$$,000\ $$cm^2)$$

Accepted Answer

$$200,000$$

Question 20

Which of the following best describes the main function of the arrector pili muscle?

Accepted Answer

Contracts to raise the hair shaft, causing 'goosebumps'

Structure and Function of Human Skin: Layers, Appendages, and Nervous Structures

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