325400
Description
Flashcards by bethanylhann, updated more than 1 year ago
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Created by bethanylhann
over 10 years ago
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| Question | Answer |
| Specify the general functions of the integumentary system. | Protects underlying tissues and organs. Excretes salts, water and organic wastes. Maintains body temperature. Sysnthesizes Vitamin D3. Stores lipids. Detects touch, pain, pressure and temperature. |
| Identify the various glands in the skin and their roles. | Sebaceous - secrete sebum to waterproof, moisturize and inhibit bacterial growth on the skin. Apocrine Sudoriferous - found in axilla, pubis, areloae and meard area, ducts open onto hair follicles and secrete slightly viscous fluid and sweat. Merocrine Sudoriferous glands - widely distributed (esp. on palms and soles), secrete sweat. Ceruminous glands - in ear, secrete cerumen. |
| Explain how the skin heals an epidermal wound. | Basal cells break contact with basement membrane and migrate across wound stimulated by EGF. Stop migration due to contact inhibition, relocated cells divide to build new epidermal layers. |
| What is a zit? | Occurs where skin cells block the opening of a sebacous gland. Oil builds up and bacteria feed off the oil and multiply causing inflammation. |
| Identify some of the effects of ageing on the skin. | Reduced skin elasticity due to loss of elastic fibres and fraying of collagen fibres. Epidermal thinning. Reduced Langerhan cells, vitamin D3 production, melanocyte activity, blood supply and repair rate. |
| Deodeant is used to mask the effects of secretion from which type of gland? | Apocrine Sudoriferous glands of the axilla. |
| What complications may arise from 2nd degree burns? | Both dermis and epidermis are damaged leading to possibility of microbial invasion and infection, as well as loss of fluid and heat. |
| How does skin regulate body temperature? | Heat stimulates thermoreceptors which send impulses to the brain to initiate sweating which evaporates and cools the body. Also, blood vessel dilation allows heat to radiate away, blood vessel constrictyion retains heat. |
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