Homeostasis Definition Temperature regulation Poikilotherms – passive regulation Homeotherms – metabolic regulation Control theory – negative feedback.

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Presentation transcript:

Homeostasis Definition Temperature regulation Poikilotherms – passive regulation Homeotherms – metabolic regulation Control theory – negative feedback Human temperature control

Hypothalamus Body Brain Temperature Control

Hypothalamus Body _ Brain Temperature Control

Thermostat Furnace Hypothalamus Body _ _ Brain Temperature Control Graded controlAll-or-none, ‘bang-bang’ control 3 thermostats1 thermostat Many mechanismsOne mechanism

Physiology of sleep

sleep spindles and K complexes - defining characteristics of stage 2 sleep

Sleep pathology Effects of sleep deprivation –Overall –REM People who need little sleep Circadian rhythm shifts

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