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Bwaller0016
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What is another term for the hair follicle receptor?
root hair plexus
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Hair follicle receptor is the _________ ______ ________ around each hair bulb.
sensory nerve endings
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How is the hair follicle receptor stimulated?
bending of hair
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The smooth muscle attached to the follicle is the __________ _______ muscle.
arrector pili
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Arrector pilli muscle is responsible for
_________ _________.
goose bumps
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Two types of hair are __________ & __________.
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What is pale, fine body hair of children and adult females?
vellus
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Coarse, long hair of eyebrows, scalp, axillary, and pubic regions (face and neck of males) is ____________.
terminal
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____________ is hair thinning in both sexes after age 40.
Alopecia
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True (frank) baldness is ___________ determined & ________ influenced condition.
genetically, sex
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Male pattern baldness is caused by follicular response to _______.
DHT
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Scalelike modification of the epidermis on the distal, dorsal surface of fingers and toes is the ________.
nail
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Low pH secretions and defensions ________ bacterial activity.
retard
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Low ph secretions is _______ _________.
acid matle
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(Physical/mechanical barriers)
___________ & ___________ block most water and water soluble substances.
keratin & glycolipids
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Physical barriers allow limited penetration of skin by:
- lipid soluble substances
- plant oleoresins
- organic solvents
- salts of heavy metals
- some drugs
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Biological barriers are important because of what?
- dendritic cells
- macrophages
- DNA
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______ ml/day of routine perspiration is important.
500
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What cools the body at elevated body temperature?
dilation of dermal vessels & increased sweat gland activity
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Cutaneous sensations are importan for __________, _________, and _________.
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Metabolic functions of the Integumentary system is synthesis of _________ __ _________ & __________.
Vitamin D precurser & collagenase
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Chemical conversion of _________ & some _____________ is another metabolic importance.
carcinogens and hormones
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Blood reservoir contains up to ____% of body's blood volume.
5%
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What are some excretions of the skin?
- nitrogenous wastes
- salt in sweat
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Most skin cancers are _________.
benign
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What does benign mean?
do not metastasize
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What are risk factors of skin cancers?
- over exposure to UV radiation
- frequent irritation of the skin
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Some skin lotions contain ______ in _________ that can fix damaged DNA.
enzymes, liposomes
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What are 3 major types of skin cancer?
- Basal cell carcinoma
- Squamous cell carcinoma
- melanoma
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___________ is least malignant, most common skin cancer.
Basal Cell Carcinoma
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______________ is second most common skin cancer.
Squamous Cell Carcinoma
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Most dangerous skin cancer is ___________.
Melanoma
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What do stratum basale cells do?
poliferate
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Basale cells slowly invade the ___________ & _______________.
dermis & hypodermis
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Basal cell carcinoma is cured by ____________ ____________ in 99% of cases.
surgical excision
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