homestasis
- Created by: E
- Created on: 06-12-12 20:25
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- homeostasis
- positive feedback
- optimum conditions
- change away from the optimum
- receptors detect the change
- communication system informs the effector
- effector acts to encourage change
- change away from the optimum
- receptors detect the change
- communication system informs the effector
- effector acts to encourage change
- effector acts to encourage change
- sensory receptors
- hypothalamusin the brain
- regulates and monitors the core body temperatures
- peripheral skin receptors
- temperature receptors in the skin - detects the temperatures outside
- hypothalamusin the brain
- communication system informs the effector
- receptors detect the change
- change away from the optimum
- effector acts to encourage change
- sensory receptors
- hypothalamusin the brain
- regulates and monitors the core body temperatures
- peripheral skin receptors
- temperature receptors in the skin - detects the temperatures outside
- hypothalamusin the brain
- communication system informs the effector
- receptors detect the change
- change away from the optimum
- optimum conditions
- negative feedback
- optimum conditions
- change away from the optimum
- sensory receptors detect the change
- communication system informs the effector
- effector reacts to reverse the change
- optimum conditions
- change away from the optimum
- sensory receptors detect the change
- communication system informs the effector
- effector reacts to reverse the change
- effector reacts to reverse the change
- communication system informs the effector
- sensory receptors detect the change
- change away from the optimum
- optimum conditions
- effector reacts to reverse the change
- communication system informs the effector
- sensory receptors detect the change
- change away from the optimum
- optimum conditions
- communication system
- neuronal
- rapid response
- hormonal
- long term response
- neuronal
- Endotherms- Temperature maintainance
- Hypothalamus in the brain,
- internal temp, of the blood flowing through it
- peripheral receptors
- temperature changes in the outside- prepares body for the change in outside env
- temperature-LOW
- vasoconstriction -walls of the arterioles, narrows the lumen of the arterioles-blood vessel is not too close to the surface- reduces loss of heat by radiation
- less sweat secreted- less loss by latent heat of evap
- erector muscles, hair erect- trap layer of air- poor heat conductor
- more metabolism- exergonic reaction- respiration, generate heat.
- shivering-spontaneous contraction of muscles, respiration , heat release
- Hypothalamus in the brain,
- Ectotherms- Temperature maintainance
- no internal heat regulator- depends on heat energy from sun for respiration
- behavioural adaptations to allow animal to cool down or warm up
- less energy from food used up, more used in growth
- may remain inactive for long periods
- can survive longer without consuming food
- positive feedback
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