New situation: You are running a marathon on a hot day and you are sweating a lot
1. Change in internal environment: Osmotic pressure …
2. Feedback to control centre: A message about the osmotic pressure in the blood is sent through nerves to the control centre in the brain. The control centre is
3. Response: The control centre releases stored ADH in greater quantities from the
4. Response: ADH travels in the blood to the target organ which is the
5. Corrective action: Which tubes become more permeable in this target organ?
6. Effect
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: The increased permeability of the collecting ducts in the kidneys allows for more water to be reabsorbed, leading to a decrease in urine production and an increase in blood volume and concentration. This helps to maintain homeostasis and prevent dehydration during the marathon.
1 answer