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Increased sympathetic drive to the heart increases the

safaTerkawi
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2022-08-07
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 Increased sympathetic drive to the heart increases the.

  1. Rate of diastolic depolarization in sinuatrial node cells.
  2. Coronary blood flow.
  3. Rate of conduction in Purkinje tissue.
  4. Slope of the Frank–Starling (work versus stretch) curve of the heart.
  5. Ejection fraction of the left ventricle.
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safaTerkawi
2022-08-07
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A. True   This increases the rate of impulse generation and hence heart rate.

B. True   The increase in myocardial metabolism generates vasodilator metabolites.

C. True   Rapid spread of excitation in the ventricles results in more forceful contractions as the ventricular fibres are activated nearly simultaneously.

D. True  This enhances the force of contraction at any given filling pressure.

E. True  Due to the increased force of contraction

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