Question 1

Which of the following best describes the main function of keratinocytes in the epidermis?

Accepted Answer

They synthesize keratin, providing strength and protection from mechanical stress.

Question 2

A patient presents with a yellow-orange discoloration of the skin and the whites of the eyes. Which of the following is the most likely cause?

Accepted Answer

Excess breakdown of red blood cells or bile duct blockage

Question 3

Which of the following layers of the epidermis is responsible for the synthesis of melanin?

Accepted Answer

Stratum basale

Question 4

A person with a third-degree burn on 20% of their body surface is at greatest risk for which of the following complications?

Accepted Answer

Infection and dehydration due to loss of skin barrier

Question 5

Which of the following best explains why thick skin does not contain hair follicles?

Accepted Answer

Thick skin is subject to a lot of mechanical stress and is adapted for protection rather than hair growth.

Question 6

A patient presents with blue coloration of the lips and nail beds. Which of the following best explains this finding?

Accepted Answer

Decreased oxygen bound to hemoglobin (cyanosis)

Question 7

Which of the following is a function of the dermal papillae?

Accepted Answer

They contain capillary loops that supply nutrients to the avascular epidermis.

Question 8

Which of the following best describes the process of thermoregulation by the integumentary system?

Accepted Answer

Sweat evaporates from the skin surface, cooling the body.

Question 9

Which of the following statements about melanin production is correct?

Accepted Answer

UVA and UVB rays increase melanin production equally, but increased melanin production can lead to oxidative damage and cancer.

Question 10

A patient has a genetic mutation that prevents the formation of desmosomes in the epidermis. Which of the following would most likely result?

Accepted Answer

Keratinocytes would be unable to flatten and form a waterproof barrier.

Question 11

Which of the following best explains why acne is more common in teenagers and young adults?

Accepted Answer

Hormonal changes increase sebum production, leading to clogged sebaceous glands and inflammation.

Question 12

Which of the following is a correct pairing of skin pigment and its source?

Accepted Answer

Hemoglobin – found in red blood cells and gives a pinkish hue to the skin

Question 13

A patient presents with a large, asymmetrical, darkly pigmented skin lesion with irregular borders and color variation. Which type of skin cancer is most likely?

Accepted Answer

Malignant melanoma

Question 14

Which of the following best describes the function of sebum?

Accepted Answer

It is an oily substance that lubricates and protects hair and skin.

Question 15

Which of the following best explains the appearance of pallor in a patient?

Accepted Answer

Decreased blood flow to the skin as the body conserves heat

Question 16

A patient with a second-degree burn will most likely exhibit which of the following?

Accepted Answer

Damage to the epidermis and part or all of the dermis, with pain and blistering

Question 17

Which of the following best describes the role of tactile (Meissner) corpuscles in the skin?

Accepted Answer

They detect light touch and help distinguish between different shapes and textures.

Question 18

Which of the following is a correct description of the hypodermis?

Accepted Answer

It is not technically part of the skin, but it binds the skin to muscle and bone and contains adipose tissue.

Question 19

A forensic scientist is analyzing a fingerprint left at a crime scene. Which skin structure is responsible for the unique pattern of the fingerprint?

Accepted Answer

Dermal papillae forming epidermal ridges

Integumentary System: Structure, Function, and Clinical Relevance

Guida di studio - Domande di pratica

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