The client presents to the emergency room with extensive bruising. Based on this information, the nurse tells the client that what is the cause of the black and blue marks visible on the skin as a result of injuries?
A) Ruptured capillaries containing cellular waste products
B) Constriction and dilation of the arterioles diameters
C) Holding of large volumes of blood under high pressures
D) Reversible cell injury owing to decreased blood and oxygen
A
Feedback:
The black and blue marks are known as ecchymotic areas and they result from ruptured capillaries that contain cellular waste products on their way to the kidneys for excretion. Constriction and dilation of the arterioles diameters regulates blood pressure and flow. Holding of large volumes of blood under high pressures is related to arteries.
Reversible cell injury as a result of decreased blood and oxygen is ischemia.
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