AP BIOLOGY

Detailed explanation-1: -Osmoreceptors within the hypothalamus detect when the water potential in the blood is low since the loss of water reduces their volume which triggers stimulation of nerve cells in the hypothalamus. The hypothalamus are receptors and the effector is the pituitary gland and the walls of the distal convoluted tubule.

Detailed explanation-2: -Osmoregulation is an example of a negative feedback, homeostatic control system. This system detects changes in the salinity of the water Chinook salmon live in, working to keep the body water concentration constant.

Detailed explanation-3: -Osmoregulation is the control of the blood water potential. This is a homeostatic mechanism and is coordinated by negative feedback systems.

Detailed explanation-4: -Kidneys regulate the osmotic pressure of a mammal’s blood through extensive filtration and purification, in a process known as osmoregulation. Kidneys filter the blood; urine is the filtrate that eliminates waste from the body via the ureter into the bladder.