(BIOL) Human Anatomy - Ch. 4 The Integumentary System HW

Which of the following cell types is found in the epidermis?

Langerhans' cell

The structure in the epidermis that allows humans to detect very light touch, especially in the finger tips is the ________.

Merkel cell

Cells in the stratum basale that are used as sensory receptors are called

Merkel cells

Why is some level of UV exposure necessary for skin cells?

Skin cells need some sunlight in order to produce vitamin D.

Which of the following correctly describes the layers of the dermis?

The reticular layer gives skin its strength.

Which of the following is NOT a function of sweat production? a. stimulation of hormone production b. temperature regulation c. excretion of wastes d. protection against microbes

a. stimulation of hormone production

The subcutaneous layer is loose connective tissue that is rich in ________ cells

adipose

The keratinized epithelium of the skin is called (the)

epidermis

Where in the body might some of the thinnest skin be found?

eyelids

Cells located in the stratum spinosum manufacture keratin.

false

Of genetic, environmental, and physiological factors, the most significant factor in determining skin color is ________.

genetics

Many of the structures found in the dermis are formed by an invagination or infolding of the epidermis. Which of the following are formed by epidermal tissue?

glands, nails, hair

Another name for the subcutaneous layer that shares names with a needle is the ________

hypodermis

The layer directly below the skin, the hypodermis, _________

is often the site of subcutaneous injections of drugs

Figure 4.13 Sebaceous Glands and Follicles

label

Figure 4.14 Sweat Glands

label

appropriate structure of the epidermis

label

functional organization of the integumentary system

label

reticular layer

label

tactile corpuscles

label

The pigment that causes one's normal skin color is ________

melanin

Which of the following pigments do you think is responsible for giving people a deep, tanned look after they've been lying out in the sun?

melanin

Thick skin can be found on the sole and the ________

palm

The area of the skin that contains blood vessels supplying the epidermis is the

papillary layer

exocrine glands

secrete chemical substances into ducts that lead either to other organs or out of the body

As cells are pushed from deeper layers of the epidermis toward the surface they

start to die

The epidermis is composed of which type of epithelium?

stratisfied squamous epithelium

Tom gets a severe burn on his arm. Which of the following layers, if the burn reached it, would cause repair of the epidermis to be extremely difficult, if not impossible?

stratum germinativum

If you were to receive an injection with a hypodermic needle, which layer of the integumentary system would the needle be designed to reach?

subcutaneous

The structures labeled fat, artery, vein, and cutaneous are found in which layer?

subcutaneous layer

John is looking at a skin sample in the microscope. He observes oil glands, blood vessels, hairs, and smooth muscles. Which part of the skin is he looking at?

the reticular layer of the dermis

The stratum lucidum is found only in thick skin.

true

The dead cells usually remain in the exposed stratum corneum layer for ________ before they are shed or washed away.

2 weeks

The epidermis in a section of thin skin includes the following four layers. In what order do these occur, from the basal lamina to the surface? 1. stratum granulosum 2. cstratum corneum 3. stratum basale 4. stratum spinosum

3, 4, 1, 2

Major Components of the Integumentary System

(label) skin, hair, nails, sweat glands

Which of the following is NOT a function of the integumentary system? a. synthesis and storage of lipid reserves b. production of digestive enzymes c. physical protection from environmental hazards d. thermoregulation

b. production of digestive enzymes

In addition to epidermal factors, pale skin can result from decreased ________ in the dermis.

blood flow

Which of the following is NOT included in the integumentary system a. skin b. nails c. skeletal muscles d. hair

c. skeletal muscles

Which of the following would NOT be found in a sample of thin skin? a. stratum spinosum b. stratum germinativum c. stratum lucidum d. stratum granulosum

c. stratum lucidum

Which of the following is NOT a function of the nerves that supply the skin? a. the sensation of light touch b. the perception of deep pressure c. the adjustment of oil secretion d. the perception of temperature

c. the adjustment of oil secretion

The exact shade of the skin, even within racial or ethnic groups, may vary because of different quantities of the pigments melanin and ________ within the epidermis

carotene

The pigment that is found in orange colored vegetables and accumulates inside keratinocytes is ________

carotene

A bluish coloring of the skin as a result of decreased oxygen supply is called

cyanosis

If you were doing a microscopic examination of the skin, which of the following features could you use to tell whether you were looking at thin or thick skin? a. Look for the thickness of the stratum corneum b. Look for the presence or absence of the stratum lucidum c. Consider where the sample came from on the body d. All of these options would be useful for determining whether the sample was of thick or thin skin.

d. All of these options would be useful for determining whether the sample was of thick or thin skin.

Which of the following is FALSE concerning the subcutaneous layer? a. It contains abundant adipocytes b. It stabilizes the position of the skin c. It contains a large number of arteries and veins d. It contains large volumes of elastic cartilage

d. It contains large volumes of elastic cartilage.

Which of the following is NOT associated with a hair follicle? a. Nerve plexus b. Arrector pili muscles c. Sebaceous glands d. Merocrine sweat glands

d. Merocrine sweat glands

Which of the following is NOT a reason why the skin is an effective physical barrier? a. Cells at the skin surface are continually lost and become dust, making it harder for surface organisms to take hold on the skin. b. Cells in the stratum granulosum accumulate keratin and keratohyalin, which dry the cells, making them dehydrated and tightly packed together. This isn't conducive to microbe growth. c. Skin cells at the surface are dead and create an inhospitable environment for harmful bacteria and other pathogens. d. Sebaceous glands in the skin produce sebum, a food source used by some common skin bacteria.

d. Sebaceous glands in the skin produce sebum, a food source used by some common skin bacteria.

Which of the following is a dermal structure? a. nail b. Merkel cell c. apocrine sweat gland d. arrector pili muscle e. hair follicle

d. arrector pili muscle

Which of the following nerve fibers is INCORRECTLY matched? a. lemellated corpuscles - detects deep pressure and vibration b. root hair plexus - senses movement in hair follicle c. Ruffini corpuscles - sensitive to stretch d. tactile corpuscles - detects changes in temperature

d. tactile corpuscles - detects changes in temperature

assesory structures: Which structure allows you to sense touch even when only your hair is touched?

dark nerve