Multiple Choice
In the context of homeostasis, which patient condition should be considered the highest priority for immediate medical intervention?
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1. Introduction to Anatomy & Physiology
Introduction to Organ Systems
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Which of the following is a portal system in the human body?
A
Coronary circulation
B
Pulmonary circulation
C
Hepatic portal system
D
Systemic circulation
Verified step by step guidance1
Understand the concept of a portal system: A portal system refers to a network of blood vessels that begins and ends in capillaries, allowing blood to pass through two capillary beds before returning to the heart.
Identify the hepatic portal system: This system involves the liver and is unique because it carries blood from the gastrointestinal tract and spleen to the liver. The blood passes through the capillaries of the digestive organs and then through the capillaries of the liver.
Differentiate from other circulatory systems: Coronary circulation supplies blood to the heart muscle, pulmonary circulation involves the lungs, and systemic circulation distributes blood throughout the body. None of these involve a portal system.
Recognize the function of the hepatic portal system: It allows the liver to process nutrients and detoxify substances absorbed from the digestive tract before they enter the systemic circulation.
Conclude why the hepatic portal system is the correct answer: It is the only option listed that fits the definition of a portal system, involving two capillary beds in sequence.
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