Discuss the role of vasopressin in the urinary system
What will be an ideal response?
The distal and collecting tubules are impermeable to H2O except in the presence of vasopressin, also known as anti-diuretic hormone, which increases their permeability to H2O. Vasopressin is produced by several specific neuronal cell bodies in the hypothalamus and then stored in the posterior pituitary gland. The hypothalamus controls release of vasopressin from the posterior pituitary into the blood. In negative-feedback fashion, vasopressin secretion is stimulated by a H2O deficit when the ECF is too concentrated and H2O must be conserved for the body, and it is inhibited by a H2O excess when the ECF is too dilute and surplus H2O must be eliminated in urine.
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A) adenosine diphosphate B) adenine C) adenosine triphosphate D) deoxyribonucleic acid E) ribose