homeostasis Flashcards
metabolism
the sum of all chemical processes in the body
responsiveness
body’s ability to detect and respond to change
movement
motion of the whole body, organs, cells and molecules
growth
increase in body size due to increase in number and/or size of cells
differentiation
development of a cell from unspecialized state
reproduction
formation of new cells for growth, repair, replacement or to produce new organism
feedback cycle
- stimulus
- controlled condition
- receptors
- control centre
- effectors
- response
- return to homeostasis
stimulus
disruption of homeostasis (by increasing or decreasing)
controlled condition
controlled condition
receptors
monitors condition and nerve impulses or chemical signals
control centre
(usually brain) and analyses information, determines set point and appropriate response
effectors
provides means for a response
response
alters the controlled reaction
return back
condition brought back to normal
what is negative feedback
when the body has surplussed it’s condition, so it works to decrease
what is positive feedback
when the body has a lack of it’s condition, so it works to increase
what is an example of negative feedback
body is too hot, so it sweats to cool down
what is an example of positive feedback
body is too cold, so it shivers to warm up
