Which Capillary Would Be ^least likely to Allow Substances to Enter

question 6

Multiple Choice

Which capillary would be ^least likely to allow substances to enter or exit the blood due to tight junctions that join the endothelial cells?

• A) sinusoidal capillaries
• B) continuous capillaries
• C) closed capillaries
• D) fenestrated capillaries

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Definitions:

Hematocrit Test

A blood test that measures the proportion of red blood cells in the blood.

Erythrocytes

Red blood cells that carry oxygen from the lungs to the body's tissues and transfer carbon dioxide back to the lungs for expulsion.

Polycythemia

Polycythemia is a condition characterized by an increased number of red blood cells in the bloodstream.

Erythropoiesis

The production of red blood cells in the bone marrow.