Question 1

Which layer of the skin is primarily responsible for anchoring the skin to underlying structures and is composed mainly of loose connective tissue and adipose tissue?

Accepted Answer

Hypodermis

Question 2

A patient presents with a bluish discoloration of the skin. Which of the following best explains this condition?

Accepted Answer

Cyanosis due to low oxygenated blood

Question 3

Which of the following is TRUE regarding the epidermis?

Accepted Answer

It is avascular and receives nutrients via diffusion from the dermis.

Question 4

Which cell type in the epidermis is responsible for producing melanin and protecting keratinocyte DNA from UV radiation?

Accepted Answer

Melanocytes

Question 5

A person develops a callus on their hand due to repetitive pressure. Which layer of the skin is most likely to thicken in response?

Accepted Answer

Stratum corneum

Question 6

Which of the following best describes the process of thermoregulation when body temperature rises above normal?

Accepted Answer

Sweating and vasodilation promote heat loss.

Question 7

Which of the following is NOT a function of the integumentary system?

Accepted Answer

Regulation of blood glucose levels

Question 8

A patient is diagnosed with basal cell carcinoma. From which layer of the epidermis does this cancer arise?

Accepted Answer

Stratum basale

Question 9

Which of the following glands is associated with hair follicles and secretes an oily substance that helps waterproof the skin?

Accepted Answer

Sebaceous glands

Question 10

A patient presents with a mole that is asymmetrical, has irregular borders, and is evolving in size. Which type of skin cancer is most likely?

Accepted Answer

Malignant melanoma

Question 11

Which layer of the dermis contains Meissner (tactile) corpuscles and forms dermal papillae that interlock with the epidermis?

Accepted Answer

Papillary layer

Question 12

Which of the following best describes the role of calcitriol in the body?

Accepted Answer

It is necessary for the absorption of $$Ca^{2+} by $$the small intestine.

Question 13

Which of the following is a normal skin marking that results from the pattern of dermal ridges and is used for identification?

Accepted Answer

Fingerprint

Question 14

A patient with albinism lacks pigmentation in their skin, hair, and eyes. Which enzyme is deficient in these individuals?

Accepted Answer

Tyrosinase

Question 15

Which of the following best explains why the epidermis is able to regenerate after injury?

Accepted Answer

Cells in the stratum basale and spinosum are metabolically and mitotically active.

Question 16

Which of the following is a modified sweat gland that produces earwax?

Accepted Answer

Ceruminous gland

Question 17

A patient develops a decubitus ulcer over the ischial tuberosity. What is the primary cause of this condition?

Accepted Answer

Lack of oxygen to tissues due to high pressure

Question 18

Which of the following best describes the composition of the nail plate?

Accepted Answer

Stratified squamous epithelium with hard keratin

Question 19

Which of the following is a function of arrector pili muscles?

Accepted Answer

Cause hair to stand up, producing 'goosebumps'

Question 20

Which of the following best describes the difference between thick and thin skin?

Accepted Answer

Thick skin has all five epidermal layers and a thick stratum corneum.

Question 21

Which of the following is a plausible explanation for the development of cellulite?

Accepted Answer

Formation of collagen bands around adipose tissue in the hypodermis

The Integumentary System: Structure and Function

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