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The secretion of which hormone increases the permeability of cells in the collecting ducts to water so more can be reabsorbed?

A.

Aldosterone hormone

B.

Atrial natriuretic peptide hormone

C.

Antidiuretic hormone

D.

Parathyroid hormone

Answer and Explanation

The Correct Answer is C

A. Aldosterone hormone: Aldosterone affects sodium and potassium reabsorption, increasing water retention indirectly, but it does not directly increase water permeability in the collecting ducts.

B. Atrial natriuretic peptide hormone: This hormone decreases blood volume by inhibiting sodium reabsorption, leading to more water excretion, not reabsorption.

C. Antidiuretic hormone (ADH): ADH increases the permeability of the collecting ducts to water, allowing more water to be reabsorbed into the bloodstream.

D. Parathyroid hormone: This hormone primarily regulates calcium levels, not water permeability.


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Related Questions

Correct Answer is A

Explanation

A. Mastication: Mechanical digestion involves physically breaking down food into smaller pieces, and mastication is a prime example of this.

B. Absorption: This is the process by which nutrients pass from the digestive system into the bloodstream, not a form of mechanical digestion.

C. Catabolism: Catabolism refers to chemical processes that break down molecules within the body, not mechanical digestion.

D. Anabolism: This refers to the synthesis of complex molecules from simpler ones, not related to the physical breakdown of food.

Correct Answer is A

Explanation

A. Proximal convoluted tubule: The proximal convoluted tubule is the main site of creatinine secretion as well as the reabsorption of nutrients and water.

B. Distal convoluted tubule: While secretion occurs here, it is not the main site for creatinine; this site mainly adjusts the final urine concentration.

C. Collecting duct: This part primarily deals with water and electrolyte balance but is not the main site for creatinine secretion.

D. Loop of Henle: This structure plays a key role in water and sodium balance but does not play a significant role in creatinine secretion.

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