Questions: Select all that apply Which renal tubule segments are influenced by aldosterone? Collecting duct Proximal convoluted tubule Ascending limb of nephron loop Distal convoluted tubule Descending limb of nephron loop

The segments of the renal tubule influenced by aldosterone are:

• Collecting duct
• Distal convoluted tubule

Explanation:

1. Collecting duct: Aldosterone acts on the principal cells in the collecting duct to increase sodium reabsorption and potassium secretion. This is a key site where aldosterone exerts its effects to regulate electrolyte balance and blood pressure.

2. Distal convoluted tubule: Aldosterone also acts on the distal convoluted tubule, where it promotes sodium reabsorption and potassium excretion, similar to its action in the collecting duct.

3. Proximal convoluted tubule: This segment is not directly influenced by aldosterone. Instead, it is primarily involved in the reabsorption of a large proportion of the filtrate, including sodium, but this process is not regulated by aldosterone.

4. Ascending limb of nephron loop: This segment is involved in the reabsorption of sodium, potassium, and chloride, but it is not directly influenced by aldosterone.

5. Descending limb of nephron loop: This segment is primarily involved in water reabsorption and is not influenced by aldosterone.

In summary, aldosterone primarily affects the collecting duct and distal convoluted tubule in the renal tubule.