Homeostasis
- Created by: Molly_Green
- Created on: 23-03-16 10:50
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- Homeostasis
- maintaining a constant internal environment
- Temperature
- Too hot
- capillaries dilate
- blood rushes to skin surface
- sweat
- evaporates to cool down the skin
- hairs lie flat
- capillaries dilate
- Too cold
- shiver
- produces kinetic energy to transfer to heat energy
- capillaries constrict
- less blood to skin surface
- hairs stand on end
- trap an insulating layer of air
- shiver
- best at 37 degrees celcius
- thermoregulatory centre
- hypothalamus
- brain
- senses changes in temperature
- receives impulses (messages) from skin
- senses changes in temperature
- hypothalamus
- Too hot
- Temperature
- Water content
- osmoreceptors
- brain
- too little water
- concentrated urine
- more ADH released by pituitary gland
- more water reabsorbed into blood
- more permeable collecting ducts
- more ADH released by pituitary gland
- more water reabsorbed into blood
- more permeable collecting ducts
- more permeable collecting ducts
- more water reabsorbed into blood
- more ADH released by pituitary gland
- more permeable collecting ducts
- more water reabsorbed into blood
- lost through sweat, urine, breathing
- too little water
- concentrated urine
- lost through sweat, urine, breathing
- too much water
- osmoreceptors
- dilute urine
- less water reabsorbed into blood
- less permeable collecting ducts
- less ADH released by pituitary gland
- less water reabsorbed into blood
- less permeable collecting ducts
- less ADH released by pituitary gland
- less ADH released by pituitary gland
- less permeable collecting ducts
- less water reabsorbed into blood
- less ADH released by pituitary gland
- less permeable collecting ducts
- drinking too much
- osmoreceptors
- osmoreceptors
- The Kidney
- Urea
- toxic
- filtered out of the blood
- produced from the breakdown of amino acids in the liver
- Water
- whatever is not needed is filtered out
- useful reabsorbed
- Water content
- too much water
- dilute urine
- drinking too much
- too much water
- Ions
- useful reabsorbed
- Proteins
- large molecules
- cannot be filtered
- large molecules
- Urea
- maintaining a constant internal environment
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