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Question |
Answer |
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What are the problems if body water levels drop too low? |
- Inadequate perfusion due to low blood volume
- A build up of waste products due to insufficient urine volume
- Increased solute concentrations affect cell function
- Inability to sweat and control body temperature
- Death
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What are the problems if body water levels get too great? |
- Oedema
- Increased blood volume and therefore pressure could damage the CVS
- A decrease in solute concentrations disrupt normal cell function
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If you take a fat and a thin cow, which will have the most body water and why? |
The thin cow as adipose tissue contains little water |
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Metabolic water is derived from which reaction? |
The oxidation of hydrogen |
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What is "insensible water loss"? |
Insensible water loss is water loss which cannot be sensed by the individual and tends to be a response to thermoregulation rather than being a regulated process of water homeostasis |
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As milk yield increases how does this effect water intake?
- A - Water intake increases more than milk yield
- B - Increases in water intake match milk production litre for litre
- C - Water intake increases but not as much as milk yield
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What are aquaporins? |
- Family of membrane channel proteins
- Over a dozen homologous water transporting proteins make up this family in mammals
- Allow rapid transport of substances across membranes
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AQP2 is inserted into the membrane of which cells to increase water reabsorption? |
Principal cells of the collecting duct |
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Which hormone influences this insertion? |
ADH |
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What are the two differant types of nephron called? |
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