Question 1

The epithelial tissue root sheath is the ________ layer of the concentric layers making up the hair follicle wall; it derives from the ________.
A) inner; epidermis
B) inner; dermis
C) outer; epidermis
D) outer; dermis

Accepted Answer

The epithelial tissue root sheath is the inner layer of the hair follicle wall and it derives from the epidermis.

Question 2

The type of gland that secretes sweat into a hair follicle that is found in the axillary, anal, and genital regions is the ________ sweat gland.
A) apocrine
B) merocrine
C) ceruminous
D) sebaceous

Accepted Answer

Apocrine sweat glands are found in the axillary, anal, and genital regions and secrete sweat into hair follicles.

Question 3

What is the greatest risk factor for skin cancer?
A) Exposure to UV light rays
B) Advanced age
C) Being a female
D) Low skin hydration levels
E) Using excessive sun block

Accepted Answer

Exposure to UV light rays is the greatest risk factor for skin cancer, as UV radiation from the sun or tanning beds can damage the DNA in skin cells, leading to mutations and cancer.

Question 4

When exposed to ultraviolet light, keratinocytes convert a steroid precursor into ________, a molecule that is crucial for regulation of calcium levels.
A) calcitriol
B) cholecalciferol
C) calcitonin
D) creatine
E) phosphorus

Accepted Answer

Keratinocytes in the skin convert a steroid precursor into cholecalciferol (vitamin D3) when exposed to ultraviolet light, which is then further processed in the liver and kidneys to form calcitriol, the active form of vitamin D that regulates calcium levels.

Question 5

From what else, besides physical trauma, does the skin provide protection?

Accepted Answer

The answer of From what else, besides physical trauma, does...

Question 6

Drugs that are administered by skin patches tend to be ________ soluble molecules that are absorbed ________.
A) lipid; slowly
B) lipid; quickly
C) water; slowly
D) water; quickly

Accepted Answer

Lipid-soluble molecules can easily penetrate the lipid-rich outer layer of the skin, allowing for slow and sustained absorption into the bloodstream.

Question 7

Sebum is a secretion that
A) cools the skin and eliminates certain drugs.
B) lubricates skin and helps defend against bacteria.
C) maintains water balance through waterproofing the skin.
D) acts as a pheremone once reproductive maturity is reached.

Accepted Answer

Sebum is an oily secretion produced by sebaceous glands that helps to lubricate the skin and hair, and it also has antibacterial properties that help defend against bacteria.

Question 8

Cerumen is a secretion that
A) lubricates vellus hairs and waterproofs the skin of the limbs.
B) lubricates the ear canal and traps debris before it reaches the eardrum.
C) cools the body through water evaporation.
D) tends to cause acne on the skin of the face.
E) acts as a pheremone.

Accepted Answer

Cerumen, commonly known as earwax, is produced in the ear canal and serves to lubricate the ear canal and trap debris, preventing it from reaching the eardrum.

Question 9

Where on the human body is the hair thick enough to retain heat?
A) Beard
B) Axillary region
C) Nose
D) Pubic region
E) Scalp

Accepted Answer

The scalp is the best choice, as it is covered in a thick layer of hair that provides insulation and retains heat. The other options (beard, axillary region, nose, pubic region) may have hair, but they are not as thick or extensive as the hair on the scalp.

Question 10

Apocrine sweat glands secrete sweat by having the apical portion of epithelial cells pinch off.

Accepted Answer

Apocrine sweat glands release their secretions through a process called apocrine secretion, where the apical portion of the cell pinches off and releases its contents.

Question 11

The structure responsible for pulling on the follicle and causing "goose bumps" is the
A) external root sheath.
B) internal root sheath.
C) epithelial root sheath.
D) arrector pili muscle.
E) papilla.

Accepted Answer

The arrector pili muscle is a small muscle attached to hair follicles in mammals. When it contracts, it pulls on the follicle, causing the hair to stand up and creating "goose bumps."

Question 12

One of the main dangers of burns is
A) dehydration, as water can escape from the body.
B) hyperthermia, as temperature regulation is very compromised.
C) hypocalcemia, as blood ion levels are dramatically altered.
D) respiratory infection, as body defenses are concentrated superficially.

Accepted Answer

Burns can cause dehydration because the skin, which normally acts as a barrier to prevent water loss, is damaged, allowing water to escape from the body.

Question 13

Cancer cells in the epidermis are attacked by
A) Merkel cells.
B) epidermal dendritic cells.
C) melanocytes.
D) keratinocytes.

Accepted Answer

Epidermal dendritic cells, also known as Langerhans cells, are part of the immune system and help identify and attack cancer cells in the epidermis.

Question 14

Production of this vitamin requires skin exposure to the sun. This vitamin is crucial for regulation of calcium and phosphate. A) Vitamin A B) Vitamin B₁₂ C) Vitamin C D) Vitamin D E) Vitamin E

Accepted Answer

Vitamin D is produced in the skin in response to sunlight exposure and is essential for the regulation of calcium and phosphate in the body.

Question 15

Skin is an entirely waterproof barrier, preventing all gain or loss of fluid from the skin except sweat.

Accepted Answer

The skin is not entirely waterproof; it allows for some water loss through transepidermal water loss (TEWL) and can absorb certain substances.

Question 16

Transpiration is another name for sweating.

Accepted Answer

Transpiration refers to the process of water movement through plants and its evaporation from aerial parts, such as leaves, stems, and flowers, not sweating in humans.

Question 17

Which of these are functions of hair? A: Sensory reception B: Heat retention C: Immune function D: Protection E: Formation of Vitamin D₃ A) a, b, d B) a, d, e C) a, b, d, e D) a, b, c, d, e

Accepted Answer

Hair functions include sensory reception, heat retention, and protection. It does not play a role in immune function or the formation of Vitamin D₃.

Question 18

One of the components of sweat is the nitrogenous waste urea.

Accepted Answer

Sweat contains small amounts of urea, which is a nitrogenous waste product, along with water, salts, and other substances.

Question 19

Immune cells of the epidermis tend to be found in the stratum
A) granulosum.
B) lucidum.
C) spinosum.
D) basale.
E) corneum.

Accepted Answer

The stratum spinosum contains Langerhans cells, which are immune cells that help protect the skin from pathogens.

Question 20

The growth rate for a scalp hair is about ________ per day for 1.5 to 7 years, and then the hair becomes dormant.
A) 1.3 mm
B) 1.3 cm
C) 1/30 mm
D) 1/3 mm
E) 3.1 mm

Accepted Answer

The average growth rate for scalp hair is approximately 1/3 mm per day.

Quiz 6: Integumentary System

The epithelial tissue root sheath is the layer of the concentric layers making up the hair follicle wall; it derives from the .

The type of gland that secretes sweat into a hair follicle that is found in the axillary, anal, and genital regions is the ________ sweat gland.

What is the greatest risk factor for skin cancer?

When exposed to ultraviolet light, keratinocytes convert a steroid precursor into ________, a molecule that is crucial for regulation of calcium levels.

From what else, besides physical trauma, does the skin provide protection?

Drugs that are administered by skin patches tend to be soluble molecules that are absorbed .

Sebum is a secretion that

Cerumen is a secretion that

Where on the human body is the hair thick enough to retain heat?

Apocrine sweat glands secrete sweat by having the apical portion of epithelial cells pinch off.

The structure responsible for pulling on the follicle and causing "goose bumps" is the

One of the main dangers of burns is

Cancer cells in the epidermis are attacked by

Production of this vitamin requires skin exposure to the sun. This vitamin is crucial for regulation of calcium and phosphate.

Skin is an entirely waterproof barrier, preventing all gain or loss of fluid from the skin except sweat.

Transpiration is another name for sweating.

Which of these are functions of hair? A: Sensory reception B: Heat retention C: Immune function D: Protection E: Formation of Vitamin D₃

One of the components of sweat is the nitrogenous waste urea.

Immune cells of the epidermis tend to be found in the stratum

The growth rate for a scalp hair is about ________ per day for 1.5 to 7 years, and then the hair becomes dormant.

Quiz 6: Integumentary System

The epithelial tissue root sheath is the ________ layer of the concentric layers making up the hair follicle wall; it derives from the ________.

The type of gland that secretes sweat into a hair follicle that is found in the axillary, anal, and genital regions is the ________ sweat gland.

What is the greatest risk factor for skin cancer?

When exposed to ultraviolet light, keratinocytes convert a steroid precursor into ________, a molecule that is crucial for regulation of calcium levels.

From what else, besides physical trauma, does the skin provide protection?

Drugs that are administered by skin patches tend to be ________ soluble molecules that are absorbed ________.

Sebum is a secretion that

Cerumen is a secretion that

Where on the human body is the hair thick enough to retain heat?

Apocrine sweat glands secrete sweat by having the apical portion of epithelial cells pinch off.

The structure responsible for pulling on the follicle and causing "goose bumps" is the

One of the main dangers of burns is

Cancer cells in the epidermis are attacked by

Production of this vitamin requires skin exposure to the sun. This vitamin is crucial for regulation of calcium and phosphate.

Skin is an entirely waterproof barrier, preventing all gain or loss of fluid from the skin except sweat.

Transpiration is another name for sweating.

Which of these are functions of hair? A: Sensory reception B: Heat retention C: Immune function D: Protection E: Formation of Vitamin D3

One of the components of sweat is the nitrogenous waste urea.

Immune cells of the epidermis tend to be found in the stratum

The growth rate for a scalp hair is about ________ per day for 1.5 to 7 years, and then the hair becomes dormant.

The epithelial tissue root sheath is the layer of the concentric layers making up the hair follicle wall; it derives from the .

Drugs that are administered by skin patches tend to be soluble molecules that are absorbed .

Which of these are functions of hair? A: Sensory reception B: Heat retention C: Immune function D: Protection E: Formation of Vitamin D₃