Specialized Endothelial Cells in the Brain Are Responsible for Much

question 21

Multiple Choice

Specialized endothelial cells in the brain are responsible for much of the function of the blood-brain barrier. Which of the following characteristics allow this specialized activity?

• A) gap junctions between cells
• B) tight junctions between cells
• C) transport proteins that allow glucose to cross from the circulation into the CSF
• D) transport proteins that allow oxygen to cross from the circulation into the CSF
• E) b and c only
• F) b, c and d only

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Definitions:

SA Node

The sinoatrial node, known as the heart's natural pacemaker, which initiates the electrical impulses that dictate heart rhythm.

Coronary Veins

Veins that drain deoxygenated blood from the myocardium (heart muscle) into the right atrium.

Myocardium

The muscular tissue of the heart, responsible for the contraction and propulsion of blood.

Coronary Sulcus

A groove on the surface of the heart marking the division between the ventricles and the atria.