Which layer of the heart contains muscle fibers that contract to ...

[sdfghj]

Which layer of the heart contains muscle fibers that contract to pump blood?
 
  a. Myocardium
  b. Endocardium
  c. Epicardium
  d. Pericardium

Question 2

Which reason best explains why diabetics are prone to infection?
 
  a. High glucose levels provide an environ-ment conducive to bacterial growth.
  b. Atherosclerotic vascular changes decrease blood supply to tissues.
  c. Diabetics display abnormal phagocyte function.
  d. Diabetics display decreased leukocyte function.

[akemokai]

Answer to Question 1

A
The myocardium is the middle layer of muscle fibers of the heart that contract to pump blood. The endocardium is the lining of the inner surface of the heart chambers, the epicardium is the outer layer of the heart muscle, and the pericardium is the membranous sac that surrounds the heart.

Answer to Question 2

B
The primary reason for increased risk of infection in diabetic patients is the hyperglycemic envi-ronment. Lesser risk factors include atherosclerotic vascular changes, abnormal phagocyte func-tion, and decreased leukocyte function.

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TYSM

[bblaney]

Excellent