Which of the following accurately describes the events that occur following dete

Question

Which of the following accurately describes the events that occur following detection of decreased blood pressure/volume at the nephron?

Calcitriol is secreted from the kidney, which stimulates calcium absorption at the small intestine and therefore water reabsorption at the colon by osmosis.

Renin is secreted from the kidney, which leads to active angiotensin II, leading to vasoconstriction, increased fluid intake due to thirst and decreased water loss in urine.   

Renin is secreted from the kidney, which stimulates brainstem thirst centers leading to increased fluid intake.

Aldosterone is secreted by the pituitary gland, which stimulates aquaporin synthesis at the collecting duct, leading to decreased water loss in urine.

Angiotensin is secreted by the pituitary gland, which stimulates aldosterone secretion by the adrenals, leading to increased salt reabsorption and water reabsorption by osmosis.

Calcitriol is secreted from the kidney, which stimulates calcium absorption at the small intestine and therefore water reabsorption at the colon by osmosis.

Renin is secreted from the kidney, which leads to active angiotensin II, leading to vasoconstriction, increased fluid intake due to thirst and decreased water loss in urine.   

Renin is secreted from the kidney, which stimulates brainstem thirst centers leading to increased fluid intake.

Aldosterone is secreted by the pituitary gland, which stimulates aquaporin synthesis at the collecting duct, leading to decreased water loss in urine.

Angiotensin is secreted by the pituitary gland, which stimulates aldosterone secretion by the adrenals, leading to increased salt reabsorption and water reabsorption by osmosis.

Explanation / Answer

Renin is secreted from the kidney, which leads to active angiotensin II, leading to vasoconstriction, increased fluid intake due to thirst and decreased water loss in urine.

Renin initiates renin-angiotensin system by spliting angiotensinogen, made by the liver, to yield angiotonin I, which is been further Transform into angiotensin II through ACE in the capillaries of lungs. Angiotensin II then vasoconstricts, increases the discharge of aldosterone and ADH, & activating the hypothalamus to initiate the reflex of thrist, leading to an increase in blood pressure

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