Question

portal system is not associated with which of the following tissue/organ? (a) liver (b)nephron (c)pituitary (d)alveoli

Answer 1

Answer:

D: Alveoli

Explanation:

Nephron can also be the answer if there is the word mammal in the question as mammals don't have renal portal system

Answer 2

The answer will be d). Alveoli is the organ that is not associated with any of the portal systems working in an organism.

Portal Systems:

• A portal system can be defined as a major venous system that engages in transporting essential nutrients through blood flow.
• The blood is carried to the liver where purification takes place and ultimately to the heart.
• There are three types of portal systems taking place in an organism.
• They are Hypophyseal Portal System, Hepatic Portal System, and the Renal Portal System.

Other options:

a). Liver: This falls under the Hepatic portal system.

b). Nephron: It falls under Renal Portal System.

c). Pituitary: This falls under the Hypophyseal Portal System that connects the regions of the hypothalamus to the regions of the anterior pituitary.

Alveoli are part of the Respiratory System but not a part of the major portal systems. Hence, the correct option will be d). alveoli.

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