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A decrease in blood pressure/volume will cause the release of:

Correct answer: A. Atrial natriuretic factor

  • A. Atrial natriuretic factor
  • B. Aldosterone
  • C. ADH
  • D. Renin

Explanation

• Atrial natriuretic factor (ANF) is responsible for lowering of blood pressure and volume. The walls of the atria of the heart release ANF in response to an increase in blood volume and pressure. It opposes regulation by the renin-angiotensin-aldosterone-system (RAAS). It inhibits NaCl reabsorption by the collecting duct and reduces aldosterone release from the ad • Antidiuretic hormone (ADH) is a chemical produced in the brain that causes the kidneys to release less water, decreasing the amount of urine produced. A high ADH level causes the body to produce less urine. A low level results in greater urine production. •Renin is an enzyme that helps control your blood pressure and maintain healthy levels of sodium and potassium in your body. Made by special cells in your kidneys, renin is released into your bloodstream when your blood pressure drops too low.

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About Homeostasis

Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.

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