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The CK test is useful to detect which of the following?
I. Muscular dystrophy
II. Rhabdomyolysis
III. Heart attacks

a. I only
b. III only
c. I and II only
d. II and III only
e. All

Answer: E (All).

The CK test measures the amount of creatine kinase (CK) in the blood. CK is a type of protein, known as an enzyme. It is mostly found in skeletal muscles and heart, with lesser amounts in the brain. Skeletal muscles are the muscles attached to skeleton.

A CK test is most often used to diagnose and monitor muscular injuries and diseases. These diseases include:

1. Muscular dystrophy, a rare inherited disease that causes weakness, breakdown, and loss of function of skeletal muscles. It mostly occurs in males.

2. Rhabdomyolysis, a rapid breakdown of muscle tissue. It can be caused by a serious injury, muscle disease, or other disorder.

3. The test can also be used to help diagnose a heart attack, though not very often. CK testing used to be a common test for heart attacks. Try our Naplex Questions QBank.