what is the function of antidiuretic hormone (adh)
Vasopressin Vasopressin, also named antidiuretic hormone (ADH), arginine vasopressin (AVP) or argipressin,[5] is a hormone synthesized as a peptide prohormone in neurons in the hypothalamus, and is converted to AVP. It then travels down the axon of that cell, which terminates in the posterior pituitary, and is released from vesicles into the circulation in response to extracellular fluid hypertonicity (hyperosmolality). AVP has two primary functions. First, it increases the amount of solute-free water reabsorbed back into the circulation from the filtrate in the kidney tubules of the nephrons. Second, AVP constricts arterioles, which increases peripheral vascular resistance and raises arterial blood pressure.[6][7][8]
Epinephrine Epinephrine, also known as adrenalin or adrenaline, is a hormone, neurotransmitter, and medication.[3][4] Epinephrine is normally produced by both the adrenal glands and certain neurons.[3] It plays an important role in the fight-or-flight response by increasing blood flow to muscles, output of the heart, pupil dilation, and blood sugar.[5][6] It does this by binding to alpha and beta receptors.[6] It is found in many animals and some single cell organisms.[7][8] Napoleon Cybulski first isolated epinephrine in 1895.[9]