Biology/explain how antidiuretic hormone...
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explain how antidiuretic hormone (ADH) controls the amount of water removed from the body. in very hot, dry conditions (low humidity) a person can drink large amounts of fluid, but still excrete small quantities of hypertonic urine - why is this?
Water is removed from the body by osmosis through the distal tubules in the nephron. (Find a sketch of a nephron) ADH controls this by controlling osmotic pressure. It does not control the water loss through the skin and lungs. When it is hot and dry you must take in more water and the increase is lost through the skin and not the kidney. Water loss through the kidney is under homeostatic control.
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Biology
Answers by Expert:
Walter Hintz
Expertise
Science teacher for over 50 years. MSc. in biology. I can answer questions in general biology, zoology, botany, anatomy and physiology and biochemistry.
Experience
I have a MSc in biology and have been a science teacher for over 50 years. At present I am a faculty member at a college and a science consultant at seven catholic schools.
Publications
The Ohio journal of Science
Momentum-The Journal of the Catholic Education Association
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