Please help me! 21. Suppose a person has lost a great deal of water through exercise. The increased loss of water is plcked up by the hypothalamus, which signals the pituitary gland to release ADH. What organ does ADH act upon, and what does It signal the organ to do?​

You have trained year for a marathon. in your first attempt to run a marathon, you decide that you want to complete this 26-mile race in 4-5 hours. a. what is the length of a marathon in kilometers (1mile= 1.6 kilometers). b. what would your average speed have to be to complete the race 4.5 hours? give your answer in kilometers per hour.