Question 1

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

Accepted Answer

Fat is not considered a component of the integumentary system, which primarily includes the skin, hair, nails, and glands. Fat is part of the subcutaneous tissue beneath the skin.

Question 2

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

Accepted Answer

The integumentary system does not produce Vitamin C; it is involved in the production of Vitamin D.

Question 3

The skin is made up of the

Accepted Answer

The skin is composed of two main layers: the epidermis (the outer layer) and the dermis (the inner layer). The hypodermis or subcutaneous layer lies beneath the skin but is not considered part of it.

Question 4

What connects the skin to underlying muscle or bone?

Accepted Answer

The subcutaneous tissue, also known as the hypodermis, connects the skin to underlying muscles or bones.

Question 5

Which of the following is NOT true of the epidermis?

Accepted Answer

The epidermis is avascular, meaning it does not contain blood vessels. It is nourished by diffusion from the dermis below.

Question 6

What material gives the epidermis the ability to resist abrasion and reduce water loss?

Accepted Answer

Keratin is a protein that strengthens the epidermis, making it resistant to abrasion and reducing water loss.

Question 7

What structures of the epidermis are responsible for detecting light touch and superficial pressure?

Accepted Answer

Merkel cells are specialized cells in the epidermis that are responsible for detecting light touch and superficial pressure.

Question 8

Which is the correct sequence of the strata of the epidermis from deep to superficial? 
1. stratum lucidum 
2. stratum basale 
3. stratum corneum 
4. stratum granulosum 
5. stratum spinosum

Accepted Answer

The correct sequence from deep to superficial is: stratum basale, stratum spinosum, stratum granulosum, stratum lucidum (only in thick skin), and stratum corneum.

Question 9

Having 8 - 10 layers of cells filled with keratin fibers and lamellar bodies is characteristic of the

Accepted Answer

The stratum spinosum is characterized by having 8-10 layers of cells that are filled with keratin fibers and lamellar bodies.

Question 10

Having 2 - 5 layers of diamond-shaped cells containing protein granules of keratohyalin that die in the upper layer is characteristic of the

Accepted Answer

The stratum granulosum is characterized by 2-5 layers of diamond-shaped cells containing keratohyalin granules, which contribute to the process of keratinization and cell death as they move to the upper layers.

Question 11

Having several layers of dead cells with indistinct boundaries and found only in thick skin is characteristic of the

Accepted Answer

The answer of Having several layers of dead cells with...

Question 12

Having 25 or more layers of dead squamous cells with a hard protein envelop, keratin and surrounded by lipids is characteristic of the

Accepted Answer

The stratum corneum is the outermost layer of the epidermis, consisting of 25 or more layers of dead squamous cells filled with keratin and surrounded by lipids, providing a tough, protective barrier.

Question 13

The primary factor that determines skin color is

Accepted Answer

Genetics primarily determines skin color by influencing the amount and type of melanin produced in the skin.

Question 14

What is the function of melanin besides providing skin pigmentation?

Accepted Answer

Melanin helps protect the skin from damage caused by ultraviolet (UV) rays from the sun.

Question 15

Melanin is produced by cells called

Accepted Answer

Melanin is produced by melanocytes, which are specialized cells located in the skin.

Question 16

How do keratinocytes obtain melanin?

Accepted Answer

Keratinocytes obtain melanin by phagocytizing the tips of melanocytes, which contain melanosomes, the organelles that store melanin.

Question 17

Which of the following does NOT affect melanin production?

Accepted Answer

Blood flow through the skin does not affect melanin production. Melanin production is primarily influenced by genetics, exposure to ultraviolet light, and hormones.

Question 18

Which of the following can cause a temporary change in skin coloration?

Accepted Answer

All the choices can cause temporary changes in skin coloration: blood flow affects redness, oxygenation affects the pinkish hue, and eating carrots can cause a yellow-orange tint.

Question 19

The congenital absence of melanin is called

Accepted Answer

Albinism is a genetic condition characterized by the absence of melanin, the pigment responsible for skin, hair, and eye color.

Question 20

The top layer of the dermis is the

Accepted Answer

The papillary layer is the uppermost layer of the dermis, located just beneath the epidermis.

Quiz 5: Integumentary System