Need sustain with A&P questions on the heart!? Blood is supplied to the myocardium by A. ...

Blood is supplied to the myocardium by
A. the coronary arteries.
B. contact beside blood in the pumping chambers.
C. arteries that branch from the pulmonary arteries.
D. the coronary sinus.
E. both A and C

The structure that permits blood flow from the right atrium to the vanished atrium in the fetal circulation is the
A.interatrial septum.
B. fossa ovalis.
C. ligamentum arteriosus.
D. foramen ovale.
E. coronary sinus.

Hemorrhage with a large loss of blood cause ________.
A. a lowering of blood pressure due to change in cardiac output
B. no change within blood pressure but a slower heart rate
C. a rise in blood pressure due to change in cardiac output
D. no translate in blood pressure but a change in respiration

Cardiac output is increased by
A.more sympathetic stimulation.
B. increased come to an end systolic volume.
C. increased stroke volume.
D. all of the above
E. A and C only

Anastomoses among coronary arterial branches provide collateral routes for blood delivery to the heart muscle..
True or False?
Answers:    1 = A
2 = D
3 = A
4 = D
5 = True


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