Question 1

The process of keratinization begins in the stratum granulosum.

Accepted Answer

Keratinization is the process of converting living keratinocytes into terminally differentiated dead cells filled with the tough protein keratin. This process begins in the stratum granulosum layer of the epidermis.

Question 2

Thick skin contains
A)seven epidermal strata and lacks sweat glands.
B)five epidermal strata and lacks sweat glands.
C)four epidermal strata and lacks sebaceous glands.
D)six epidermal strata and lacks sweat glands.
E)five epidermal strata and lacks sebaceous glands.

Accepted Answer

E

Question 3

The stratum _________ derives its name from the spiny appearance of the "bridges" that connect neighboring cells.

Accepted Answer

spinosum

Question 4

From deep to superficial,the order of the strata of the epidermis is
A)Basale - spinosum - granulosum - lucidum - corneum
B)Spinosum - granulosum - basale - lucidum - corneum
C)Corneum - lucidum - granulosum - spinosum - basale
D)Basale - granulosum - spinosum - lucidum - corneum
E)Corneum - granulosum - lucidum - spinosum - basale

Accepted Answer

The correct order of the strata of the epidermis from deep to superficial is basale, spinosum, granulosum, lucidum, and corneum. This is the order in which new cells are produced in the basal layer and then gradually migrate towards the surface, where they become flattened and keratinized in the corneum layer.

Question 5

Keratinocytes are
A)the most abundant cell type in the epidermis.
B)found throughout all epidermal strata.
C)sometimes alive and sometimes dead,depending on where they are found.
D)able to synthesize the protein keratin.
E)All of the choices are correct.

Accepted Answer

Keratinocytes are the most abundant cell type in the epidermis and are found throughout all epidermal strata. They are able to synthesize the protein keratin, which makes up the majority of the epidermis. Keratinocytes can also be alive or dead, depending on their location in the strata. Thus, option E "All of the choices are correct" is the best answer.

Question 6

Which skin markings usually disappear during childhood
A)Friction ridges
B)Capillary hemangiomas
C)Cavernous hemangiomas
D)Pili
E)Nevi

Accepted Answer

The answer of Which skin markings usually disappear during childhood
A)Friction...

Question 7

Which are applicable to the stratum corneum
A: Most superficial stratum
B: Consists of about 3-5 cell layers
C: Cells are dead
D: Interlocking keratinized cells
E: Cells are anucleate
A)a,c,d
B)a,c,e
C)a,b,d
D)a,c,d,e
E)a,b,c,d,e

Accepted Answer

The stratum corneum is the most superficial layer of the epidermis, consists of about 3-5 dead, anucleate, interlocking keratinized cell layers. Therefore, choices A, C, D, and E are all applicable to the stratum corneum.

Question 8

Freckles are the result of
A)melanocyte number and genetic inheritance.
B)melanocyte number and sun exposure.
C)melanocyte activity,genetic inheritance,and sun exposure.
D)melanocyte number,genetic inheritance,and diet.
E)melanocyte activity and diet.

Accepted Answer

Freckles are caused by a combination of factors, including the number and activity of melanocytes (cells that produce pigment), genetic inheritance, and sun exposure. When melanocytes produce an excess amount of pigment in response to sun exposure, freckles can appear. However, the genetic factor plays a role in determining the number and activity of melanocytes, which can predispose individuals to freckles. Diet does not have a significant impact on freckles.

Question 9

Which is not a function of the integument
A)Protection
B)Water loss prevention
C)Temperature regulation
D)Synthesis of cholecalciferol (vitamin D precursor)
E)No exceptions;all are functions of the integument

Accepted Answer

All of the listed choices are functions of the integument, so there is no choice that is not a function of the integument.

Question 10

Epidermal dendritic (Langerhans)cells function as part of the ______ response.
A)immune
B)sensory
C)tanning
D)heating
E)sweating

Accepted Answer

Epidermal dendritic (Langerhans) cells are specialized immune cells located in the skin. They function as part of the immune response to recognize and destroy pathogens that enter the skin.

Question 11

Normally,skin color results from a combination of
A: melanin
B: hemoglobin
C: bilirubin
D: carotene
A)a,b,d
B)a,c,d
C)a,d
D)a,b,c
E)b,c,d

Accepted Answer

The answer of Normally,skin color results from a combination of
A:...

Question 12

The skin's immune responsiveness will be diminished by a decrease in the number of epidermal _________ cells.or

Accepted Answer

The answer of The skin's immune responsiveness will be diminished...

Question 13

Generally,people have ________ number of melanocytes ______________.
A)about the same;no matter where they live
B)a highly variable;irrespective of where they live
C)a lower;if they live in colder climates of the northern hemisphere
D)a higher;if they live in the warmer climates near the equator
E)a higher;if they live in the southern hemisphere

Accepted Answer

All humans have roughly the same number of melanocytes, the cells responsible for producing melanin, which affects skin color. The variation in skin color among different populations is primarily due to differences in melanin production and distribution, not the number of melanocytes.

Question 14

The stratum _______ is found only in thick skin,such as the skin covering the palms and soles.

Accepted Answer

The answer of The stratum _______ is found only in...

Question 15

What type of stimulus is detected by the sensory receptors of the skin
A)Heat
B)Cold
C)Pressure
D)Vibration
E)All of the choices are correct.

Accepted Answer

The sensory receptors of the skin can detect a variety of stimuli including heat, cold, pressure, and vibration. Therefore, all of the choices are correct.

Question 16

The function of melanin in the skin is to
A)reduce water loss.
B)prevent infections.
C)help regulate body temperature.
D)protect against UV light.
E)keep the epidermis soft and pliable.

Accepted Answer

Melanin in the skin helps to protect against the harmful effects of UV radiation by absorbing and scattering the rays before they can penetrate deeper into the skin. This helps to prevent DNA damage which can lead to skin cancer.

Question 17

What type of epithelium is found in the epidermis
A)Keratinized stratified squamous
B)Nonkeratinized stratified squamous
C)Keratinized stratified cuboidal
D)Nonkeratinized stratitified cuboidal
E)Transitional

Accepted Answer

The epidermis consists of keratinized stratified squamous epithelium.

Question 18

Tactile (Merkel)cells are sensitive to
A)sound.
B)light.
C)touch.
D)heat.
E)cold.

Accepted Answer

Tactile (Merkel) cells are responsible for sensing touch. They are found in the skin and help us to perceive pressure and texture.

Question 19

Within the body,carotene is converted to
A)vitamin A,which is important for auditory function.
B)vitamin E,which is important for auditory function
C)vitamin E,which is important for visual function.
D)vitamin A,which is important for visual function.

Accepted Answer

Carotene is converted to vitamin A, which is important for visual function, specifically for the formation of rhodopsin, a pigment in the retina that helps with low-light vision. Vitamin E is not derived from carotene and does not play a significant role in either auditory or visual function.

Question 20

Another name for the skin is the _________ membrane.
A)serous
B)parietal
C)mucous
D)cutaneous
E)visceral

Accepted Answer

The skin is also known as the cutaneous membrane, which is the outermost protective layer of the body. It is composed of three layers: the epidermis, dermis, and hypodermis. The cutaneous membrane protects the body from dehydration, external trauma, and temperature fluctuations.

Quiz 6: Integumentary System

The process of keratinization begins in the stratum granulosum.

Thick skin contains

The stratum _________ derives its name from the spiny appearance of the "bridges" that connect neighboring cells.

From deep to superficial,the order of the strata of the epidermis is

Keratinocytes are

Which skin markings usually disappear during childhood

Which are applicable to the stratum corneum A: Most superficial stratum B: Consists of about 3-5 cell layers C: Cells are dead D: Interlocking keratinized cells E: Cells are anucleate

Freckles are the result of

Which is not a function of the integument

Epidermal dendritic (Langerhans) cells function as part of the ______ response.

Normally,skin color results from a combination of A: melanin B: hemoglobin C: bilirubin D: carotene

The skin's immune responsiveness will be diminished by a decrease in the number of epidermal _________ cells.or

Generally,people have number of melanocytes ______.

The stratum _______ is found only in thick skin,such as the skin covering the palms and soles.

What type of stimulus is detected by the sensory receptors of the skin

The function of melanin in the skin is to

What type of epithelium is found in the epidermis

Tactile (Merkel) cells are sensitive to

Within the body,carotene is converted to

Another name for the skin is the _________ membrane.