Which of the following would be an example of chemotaxis?

A. A white blood cell can move into and out of blood vessels.
B. Platelets are attracted to the rough surface of damaged blood vessels.
C. Red blood cells move due to pressure gradients generated by the heart.
D. A white blood cell moves toward an injury site due to the release of certain chemicals by injured cells.


Answer: D

Anatomy & Physiology

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