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Renal Tubules and Tubular Reabsorption and Secretion

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Renal Tubules and Tubular Reabsorption and Secretion

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Questions and Answers

What is the primary function of the renin-angiotensin-aldosterone system in blood pressure regulation?

To regulate electrolyte balance

To increase blood volume and pressure (correct)

To decrease blood volume and pressure

To stimulate the hypothalamic thirst center

What is the effect of angiotensin II on the adrenal cortex?

It stimulates the release of aldosterone (correct)

It stimulates the release of ADH

It has no effect on the adrenal cortex

It inhibits the release of aldosterone

What is the role of the granular cells in the renin-angiotensin-aldosterone system?

They release aldosterone

They release angiotensin II

They release renin (correct)

They convert angiotensin I to angiotensin II

What is the effect of increased angiotensin II on the hypothalamus?

It stimulates the release of ADH and activates the thirst center Signup and view all the answers

What is the normal net filtration pressure in the glomerulus?

15 mmHg Signup and view all the answers

What is the effect of high sodium concentration in the filtrate on the afferent arteriole?

It dilates the afferent arteriole Signup and view all the answers

What is the purpose of autoregulation mechanisms in the kidneys?

To maintain a constant GFR Signup and view all the answers

What is the effect of sympathetic nervous system activation on the afferent arteriole?

It constricts the afferent arteriole Signup and view all the answers

What is GFR?

The amount of blood filtered by the kidneys per minute Signup and view all the answers

What is the normal blood pressure in the glomerulus?

140 mmHg Signup and view all the answers