Question

Thromboxane A2 is a short-lived compound that causes:

a) anti-inflammatory effects
b) platelet clumping
c) small vessel dilation
d) sodium reabsorption

Answer 1

Thromboxane A2 does not directly cause sodium reabsorption; aldosterone is the hormone responsible for this process in the kidneys. The role of diuretics is to inhibit the reabsorption of sodium at various sites, such as the loop of Henle.

Step-by-step explanation:

Thromboxane A2 is a compound that plays a role in the clotting process by causing vasoconstriction and platelet aggregation. Unlike the provided statements, which discuss aldosterone and its effect on sodium reabsorption and water reabsorption in the kidneys, thromboxane A2 does not directly cause sodium reabsorption. In terms of the renal system, aldosterone is the hormone responsible for sodium reabsorption.

It stimulates the distal tubules of the nephron in the kidneys to reabsorb more sodium and water, thus increasing blood volume. Drugs such as diuretics can affect sodium reabsorption at different sites like the loop of Henle, where they inhibit the reabsorption of Na+ and Cl-. This information is significant in understanding drug mechanisms and their applications, such as treating hypertension or hypotension.