Answer: d. angiotensin is detected by the hypothalamus.
Step-by-step explanation:
Angiotensin is a hormone which causes the narrowing of the blood vessels. This helps in maintaining the blood pressure and also maintains the fluid balance in the body. The hormone acts on the brain. This hormone binds to the hypothalamus gland of the body, it stimulates the thirst and increases the demand for water intake. It also stimulates the release of antidiuretic hormone by the pituitary gland to increase the concentration of urine by preventing water loss.