Question

How does the renal portal system differ from the hypothalamo–hypophyseal and digestive portal systems.

Answer 1

The renal portal system, hypothalamo-hypophyseal portal system, and digestive portal system are all examples of portal systems in the body, but they differ in terms of their destinations and functions.

Step-by-step explanation:

The renal portal system, hypothalamo-hypophyseal portal system, and digestive portal system are all examples of portal systems in the body. The renal portal system is a unique portal system found in the kidney, whereas the hypothalamo-hypophyseal portal system is found between the hypothalamus and the anterior pituitary gland, and the digestive portal system is found in the liver.

While all these portal systems have capillaries at their beginning and end, the major difference lies in the destinations of the blood flow. In the renal portal system, blood flows from the efferent arteriole of the glomerulus to the vasa recta, which surround the nephron. In contrast, the hypothalamo-hypophyseal portal system transports hormones from the hypothalamus to the anterior pituitary without entering the systemic circulation. The digestive portal system brings blood from the digestive and circulatory organs directly to the liver for processing.

Answer 2

The correct answer is - The renal portal system has an artery between the first and second capillary bed. The others have a vein.

Step-by-step explanation:

A portal system is a system in which is used blood collected from one set of capillaries bed passes through a large vessel or vessels, to another set of capillaries bed before returning to the systemic circulation as the heart can not use these to transfer from all the parts of bodies.

There are several portal systems such as the renal portal system, the hypothalamo–hypophyseal and digestive portal systems, however, The renal portal system has an artery whereas others have a vein.