Homeostasis Flashcards
what type of process is equilibrium
a dynamic process
who first thought of the idea of homeostasis
Claude Bernard in 1857
how important is homeostasis in body functioning
it is a fundamental process
what does tight control of a regulated variable mean
variable stays close to the projected value
what does loose control mean
the variable may fluctuate
what is the gain of a regulated variable
the precision by which a control system can prevent deviation from homeostasis
what is negative feedback
a process which works to reduce the effect of something
what is positive feedback
a process which works to increase an effect
what are feed forward loops
physiological responses in anticipation of a change in variable
what is an example of negative feedback
body temp dec so body shivers to increase heat production and vasoconstricts to reduce heat loss
what is the equation for gain
gain = amount of correlation needed/ amount of abnormality
components of feedback system
regulated variable - sensor - control sensor - effector - regulated variable
how do negative feedback signals work
fine tune the body’s response to stimulus so homeostasis can be achieved under new conditions
