chapter 5 hw – Flashcards
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describe epidermis
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composed primarily of epithelial tissues, includes the 4-5 strata of the skin, creates a water barrier with the environment
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describe dermis
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principally comprised of collagen, includes hair follicles, glands, and blood vessels, contains the papillary and reticular layers
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describe hypodermis
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not actually considered part of the skin, associated with energy storage, thermal insulation, and mechanical padding.
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normal skin
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genetically active melanocytes result in brownish skin, genetically low number of active melanocytes resulting fairer skin
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abnormal skin
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oxygen deficiency resulting in blueness of skin color, jaundice, erythema, hereditary lack of melanin synthesis throughout the body, cyanosis
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according to modern theories, which of the following is a function of human hair? check all that apply
- maintain temp of trunk and limbs
- transmission of sexual scents
- maintain temp of the head
- protect from debris
- express non verbal communication
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transmission of sexual scents, protect from debris, express nonverbal communication
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describe sebaceous
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secretes sebum, usually opens up into a hair follicle, coats the scalp hair with oil, blockage and infection can cause pimples
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describe ceruminous
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only found in auditory canal, coats guard hairs to improve their performance, simple, coiled, tubular glands, waterproofs ear canal
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which of the following is a true statement regarding sebaceous glands? check all that apply
- sebaceous glands are a form of sudoriferous gland
- sebaceous glands secrete and oily substance called sebum
- sebaceous glands are modified mammary glands
- sebaceous glands are found at the base of eyelash hairs,
sebaceous glands are responsible for the oil that coats the hair on your scalp
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- sebaceous glands secrete and oily substance called sebum
- sebaceous glands are modified mammary glands
- sebaceous glands are found at the base of eyelash hairs,
sebaceous glands are responsible for the oil that coats the hair on your scalp
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which of the following is a normal variation of skin color? check all that apply
- a suntan
- jaundice
- cyanosis
- genetically active melanocytes
- erythema
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a suntan, genetically active melanocytes
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when the body is cold, body hair stands upright because
- the cold hair stiffens the hair shaft
- the hair bulb begins to freeze, making it difficult for the hair shaft to relax
- the hair receptors respond to cold by triggering an electrical impulse into the hair shaft
- contraction of piloerector muscle pulls the follicle vertically
- the skin stiffens around the hair shaft, making it difficult for the hair shaft to move
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contraction of piloerector muscles pulls the follicle vertically
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the part of the fingernail that is visible and covering the finger tip is called the
- nail fold
- free edge
- nail matric
- cuticle
- nail plate
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nail plate
