Chapter 6 quiz

Identify the regions of the body where apocrine glands are located. (Check all that apply.)

- anal - axillary - pubic

Identify structures of the epidermis that are responsible for the formation of fingerprints. (Check all that apply)

- epidermal ridges

When the outer layers of skin are pulled off a blister, exposure of the underlying tissue causes a great deal of pain. What type of sensory receptor is responsible for sensation of this pain?

- free nerve endings?

Identify the location(s) on the body where skin contains five layers in the epidermis. (Check all that apply)

-palms of the hands - soles of the feet

A hypodermic needle is used to give certain types of injections. Based on the name of the needle, what layers of the skin, in order, must the hypodermic needle pass through? (1 is first layer and 7 is last layer needle is directed towards)

1) stratum corneum 2) stratum granulosum 3) stratum spinosum 4)stratum basale 5) papillary layer of dermis 6) reticular layer of dermis 7) hypodermis

When part of the skin is exposed to a great deal of friction, such as when part of the foot rubs against a shoe, a blister often forms. A blister is a collection of fluid that accumulates between two layers of the skin as they separate from each other. Which two layers of the skin are

Between epidermis and dermis

A "nipplelike" extension of the dermis into the epidermis

Dermal papilla

Merocrine glands that open to the surface of the skin

Eccrine sweat glands

A fold of the epidermis that interdigitates with dermal papillae

Epidermal ridge

Epithelial cells of the epidermis die because they are filling with eleidin.

False

Sensation of light touch, temperature, pain, and pressure

Free nerve ending

An epithelial cell composing the majority of the epidermis

Keratinocyte

Sensation of deep pressure and high-frequency vibration

Lamellated (Pacinian) corpuscle

When you sit down on a bench to wait for a bus to arrive, you notice that there is a rock on the bench that you didn't see before you sat down on it. What type of sensory receptor in the skin is responsible for detecting this sensation?

Lamellated (Pacinian) corpuscle

A cell located in the epidermis that produces melanin

Melanocyte

Immediately before it reaches its final destination, the tip of a hypodermic needle passes through which layer?

Reticular layer of dermis

Which of the following correctly identifies the product of sebaceous glands and the corresponding function of this product?

Sebum; lubrication

It is important to have tactile (Meissner) corpuscles located at the surface of the skin because they are responsible for which of the following?

Sensation of fine, light touch and texture

Susan accidentally tripped on the sidewalk and scraped her knee. The scrape was superficial and did not bleed. What is the deepest layer of her skin that could have been damaged without causing her to bleed?

Stratum basale of epidermis

The sensation of fine, light touch and texture

Tactile (Meissner) corpuscle

It is important that melanin is present in its highest concentration in keratinocytes at or near the basal layer of cells to ensure that cells undergoing division are protected from ultraviolet light.

True

Sebaceous glands can be found wherever hair follicles are found on the body.

True

You are provided with a prepared slide of skin from an unknown location on the body. Upon examination, you notice 2 to 3 layers of dead cells containing the translucent protein eleidin. This indicates that this skin must have come from either the palm of the hand or sole of the foot.

True

Merocrine glands that empty into hair follicles

apocrine sweat glands

Small muscles attached to the base of the hair follicle

arrector pilli

Main portion of the nail

body

The swelled base of the hair

bulb

Fold of skin at the root of the nail

eponychium

Apocrine sweat glands open to a __________, whereas merocrine (eccrine) sweat glands open to a __________.

hair follicle; skin surface

A hypodermic needle is used to give certain types of injections. Based on the name of the needle , what space is the tip of the needle usually directed into?

hypodermis

Skin underneath the free border of the nail

hyponychium

Although melanocytes are the cells that produce melanin, the cells that actually concentrate the melanin in the apical region of the cell to protect the cell nucleus are __________.

keratinocytes

The white curved area at the base of the nail

lunula

A portion of the nail that lies beneath the eponychium

nail root

The __________ (papillary/reticular) layer of the dermis is the thickest layer of the dermis.

reticular

Lamellated (Pacinian) corpuscles are located in the __________ layer of the dermis, while tactile (Meissner) corpuscles are located in the

reticular; papillary

The portion of the hair contained within the skin

root

Oil-secreting glands that connect to the hair follicle

sebaceous gland

Holocrine glands that empty into hair follicles

sebaceous glands

The portion of the hair that exits the skin surface

shaft

Which of the following locations would have more sensory receptors per unit area?

skin in the palm

Which of the following type of tissue is found in the most superficial layer of thick skin?

stratified squamous epithelial tissue

What layer of the epidermis represents the transition from living to dead epithelial cells?

stratum granulosum

While sitting on the couch reading your anatomy and physiology book, you realize that you left a window open because you feel a light breeze blowing across your arm. The type of sensory receptor in the skin responsible for detecting this sensation is a ______________ (lamellated/tactile) corpuscle.

tactile

Sensation of fine touch, textures, and shapes

tactile (Merkel) cell

Which type of skin has more numerous dermal papillae?

thick skin