Homeostasis
- Created by: farahh24
- Created on: 11-09-18 21:00
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- Homeostasis
- Physiological responses - cooling down
- Sweating - heat absorbed from blood and evaporates into surroundings.
- Panting - water vapour from lungs absorbs heat and evaporates into atmosphere
- Light skin/fur
- Decrease heart rate
- Vasodilation - arterioles near skin surface dilate, more blood flowing, more blood flows through capillary network close to skin surface, more heat lost to surroundings.
- Decrease heart rate
- Light skin/fur
- Panting - water vapour from lungs absorbs heat and evaporates into atmosphere
- Sweating - heat absorbed from blood and evaporates into surroundings.
- Physiological responses - warming up
- Shivering - exothermic metabolic reaction
- Vaso-constriction - arterioles near skin surface constrict, less blood flows through capillary network close to skin surface, less heat lost to surroundings.
- Shivering - exothermic metabolic reaction
- Behavioural responses - warming up
- Lying on warm rocks/sand
- Running
- Vibrating wings
- Basking
- Climbing trees
- Basking
- Vibrating wings
- Running
- Lying on warm rocks/sand
- Questions
- Is hibernation and aestivation behavioural or physiological?
- Is inflation / deflation behavioural or physiological?
- Does hypothalamus instruct pancreas to secrete insulin / glycogen
- Is inflation / deflation behavioural or physiological?
- Is hibernation and aestivation behavioural or physiological?
- Behavioural responses - cooling down
- Rolling in mud / water
- Seeking shade
- Aestivation - sleeping throughout the day
- Making burrows to avoid sun
- Aestivation - sleeping throughout the day
- Seeking shade
- Rolling in mud / water
- Regulating blood sugar
- When blood sugar levels are low, pancreas secretes glucagon.
- Glucagon instructs liver to convert glycogen into glucose.
- When blood sugar levels are high, pancreas secretes insulin.
- Insulin instructs liver to convert glucose into glycogen.
- When blood sugar levels are high, pancreas secretes insulin.
- Glucagon instructs liver to convert glycogen into glucose.
- When blood sugar levels are low, pancreas secretes glucagon.
- Ectotherms - rely on surroundings to maintain body temperature
- Endotherms - rely on metabolic reactions to maintain optimum body temperature
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