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

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Presentation on theme: "Homeostasis Definition Temperature regulation Poikilotherms – passive regulation Homeotherms – metabolic regulation Control theory – negative feedback."— Presentation transcript:

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

2 Hypothalamus Body Brain Temperature Control

3 Hypothalamus Body _ Brain Temperature Control

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

5 Physiology of sleep

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

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

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