Which of the following statements about coronary blood flow is the most accurate?
A. Coronary blood flow can increase 2-5 times more when compared to its resting flow
B. the heart, under resting conditions, removes up tp 25%-45% of the O2 available in the coronary
C. the myocardium receives most of its blood supply during systole, especially in the left ventricle
D. the intramyocardial pressure is the lowest in the inner layers of the ventricular wall and incresed
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The hydrostatic pressure in a capillary in skeletal muscle is 37 mmHg at the arteriolar end and 14 mmHg at the venular end. The interstitial fluid hydrostatic pressure is 0 mmHg. The colloid osmotic pressure is 25 mmHg in the capillary and 1 mmHg in the interstitium. The net force producing fluid movement across the capillary wall at its arteriolar end is:
A. 13 mmHg out of the capillary
B. 13 mmHg into the capillary
C. 3 mmHg out of the capillary
D. 11 mmHg out of the capillary
E. 3 mmHg into the capillary
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