Chapter 5: The Integumentary System Flashcards
What organs are included in the integumentary system?
Skin, hair, nails, various glands, sensory receptors (most outter appearance body system)
List some function of the skin.
Protect against; -dehydration -Impact and friction -mole and bacterial invasion -UV light damage Receptor for sensory input Secrets wastes Regulates body temperature Synthesizes vitamin d form cholesterol molecules
What are the 4 types of cells within the epridermis?
- Keratinocytes
- Melanocytes
- Dendritic
- Tactile
Skin color is determined by 3 pigments, what are they?
- Melanocytes
- Carotene
- Hemoglobin
What is the function of the arrest or pili muscle?
Raise the hair when cold or freightened
What is the function of pacinian corpuscle?
Deep touch receptors
What Structure is reposnsible for light touch sensations?
Meiseners corpuscles
What substance is produced at the sebaceous gland of the hair follicle?
Sebum.
What is the regular body temperature?
37 +/- 0.5
What is the limit for life temperature?
43
What is the function of sebum?
Soften and lubricate the hair and skin
What are the 4 mechanisms of heat trasnfer?
- Radiation
- Conduction
- Convection
- Evaporation
What 2 layers is the skin composed of?
Epidermis and dermis
What is the subcutaneous of teh skin called?
Hypodermis
Which type of cell produced keratin and protects the underlying tissues of the skin?
Keratinocytes
What is the function of tactile cells in the skin?
Sensory neutron and function in touch sensations
Which type of skin cell paticpates in immune responses?
Dendritic Cells
What is the function of melanocytes?
Secret and transfer [igment melanin to kertinocytes
Generally how thinck is the skin?
1-2mm
Where on teh body is no hair follicles located?
Palms, soles, lips, eyelids, nipples, head of penis
How much sweat s usually released in a day?
600ml/day
With heat = 12 L/day
What is the role of sweat/sweating?
Regulate body temp and waste elimination
What makes body odour?
The secretion of organic components are decomposed by bacteria on the skin
Sebaceous glands use which type of secretion?
Holocrine secretion
Stretch marks are a result of what?
Tearing of the dermis
What is the average core body temperature?
37 +/- 0.5
Decreased body temperature results in _____.
Shivering
Bassal dialation and sweating occurs when ______.
The body temperature is increased.
