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Intro to Anatomy and Physiology, The Integumentary System with 100- correct answers (graded A+)
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Intro to Anatomy and Physiology, The Integumentary System with 100- correct answers (graded A+)
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Intro to Anatomy andPhysiology, The Integumentary
System with 100% correct
answers (graded A+)
What is the integument? - answer The integument is the largest
organ system of the body. It makes up about 16% of body weight
and has an area between 1.5 and 2 meters squared. The integument
is made up of two parts: the cutaneous membrane and accessory
structures.
What two components make up the cutaneous membrane? - answer
1. Outer epidermis
2. Inner dermis
What are accessory structures? - answer Accessory structures
originate in the dermis and extend through the epidermis to the
skin surface.
What are three examples of accessory structures? - answer 1. Hair
2. Nails
3. Multicellular exocrine glands
How is the integumentary system connected to the cardiovascular
system? - answer The integumentary system is connected to the
cardiovascular system by blood vessels in the dermis.
How is the integumentary system connected to the nervous system?
- answer The integumentary system is connected to the nervous
,system by sensory receptors that detect stimuli for pain, touch, and
temperature.
What is the hypodermis? - answer The hypodermis is also called the
superficial fascia or the subcutaneous layer. It is not considered part
of the integumentary system. The hypodermis is composed of loose
connective tissue and it separates the integument from the deep
fascia.
Where is the hypodermis located? - answer The hypodermis is
located below the dermis.
What are the five main functions of the skin? - answer 1. Protects
underlying tissues and organs
2. Excretes salts, water, and organic waste
3. Maintains body temperature
4. Produces melanin, keratin, vitamin D3, and stores lipids
5. Detects touch, pressure, pain, and temperature
What is the epidermis? - answer The epidermis is avascular
stratified squamous epithelium. Because it is avascular, nutrients
and oxygen diffuse from capillaries found in the dermis. The
epidermis is dominated by keratinocytes.
What are keratinocytes? - answer Keratinocytes are the most
abundant type of epithelial cells and contain large amounts of the
protein keratin.
Contrast thin and thick skin. - answer Thin skin covers most of the
body and has four layers of keratinocytes. Thick skin covers the
palms of the hands and the soles of the feet, and has five layers of
keratinocytes.
, List the 5 strata of keratinocytes in thick skin, inferior to superior. -
answer 1. Stratum basale
2. Stratum spinosum
3. Stratum granulosum
4. Stratum lucidum
5. Stratum corneum
List the 4 strata of keratinocytes in thin skin, inferior to superior. -
answer 1. Stratum basale
2. Stratum spinosum
3. Stratum granulosum
4. Stratum corneum
How is the stratum basale attached to the basement membrane? -
answer The stratum basale is attached to the basement membrane
by hemidesmosomes.
Which layer of keratinocytes is NOT found in thin skin? - answer
Stratum lucidum is not found in thin skin.
Basal cells are found in abundance in which layer of keratinocytes? -
answer Basal cells are found in abundance in the stratum basale.
Which layer of keratinocytes forms a strong bond between the
epidermis and the dermis? - answer The stratum basale forms a
strong bond between the epidermis and the dermis.
Which layer of keratinocytes forms epidermal ridges? - answer The
stratum basale forms epidermal ridges.
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