Master the Controlling Heart Rate fast ⚡ – clear explanations, OCR-aligned.
You’ll cover
• How the heart generates its own rhythm through myogenic contraction.
• The roles of the SAN, AVN, Bundle of His and Purkyne fibres in coordinating cardiac contraction.
• How the autonomic nervous system regulates heart rate through sympathetic and parasympathetic pathways.
• The role of sensory receptors (chemoreceptors, baroreceptors and stretch receptors) in detecting physiological changes.
• How adrenaline increases heart rate and cardiac output during exercise or stress.
What’s included
• Labelled diagram showing the conduction pathway through the heart (SAN, AVN, Bundle of His and Purkyne fibres).
• Diagram illustrating how the cardiovascular centre communicates with the heart via the autonomic nervous system.
• Table summarising the receptors that provide sensory input to the cardiovascular centre.
• Clear explanation of antagonistic control by the accelerator nerve and vagus nerve.
• Step-by-step explanation of adrenaline’s mechanism of action on heart muscle cells.
Format
Web-based textbook topic. Mobile/desktop friendly. Access with no time limit, updates included.