Heart Rate Regulation

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  • Heart Rate Regulation
    • Intrinsic Control
      • Temperature changes will affect the viscosity of the blood and speed of nerve impulse transmission
      • Venous return changes will affect the stretch in the ventricle walls. force of ventricular contraction and therefore stroke volume
    • Hormonal Control
      • Adrenaline and noradrenaline are released from the adrenal glands increasing tjhe force of ventricular contractions (therefore SV) and increasing the speed of electrical activity through the heart (therefore HR)
    • HR is increased via the sympathetic nervous system. HR is decreased via the parasympathetic nervous system.

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