Which of the Following Substances Requires Mediated Transport to Cross

question 5

Multiple Choice

Which of the following substances requires mediated transport to cross the blood- brain barrier?

• A)oxygen
• B)hydrogen ions
• C)ethanol
• D)glucose
• E)carbon dioxide

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Definitions:

Radioactive Contrast Medium

A type of contrast agent used in medical imaging that contains radioactive materials to improve the visibility of internal organs or structures.

Pulmonary Blood Flow

involves the circulation of blood from the heart to the lungs and back, facilitating oxygenation of the blood.

Chronic Bronchitis

A long-term inflammation of the bronchial tubes, leading to coughing, phlegm, and breathing difficulties, often associated with smoking.

Tuberculosis

An infectious disease caused by the bacterium Mycobacterium tuberculosis that primarily affects the lungs but can spread to other organs.