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26 Cards in this Set

  • Front
  • Back

What is another name for the SA node?

Pacemaker

Where does the impulse start?

SA node

What happens when the SA node pushes blood through the ventricles?

Atrial Systole

Where is the signal passed through after the atrial systole?

AV node

How long does the AV node hold the impulse?

0.1-0.2

What happens after the AV node holds the impulse?

Ventricular Systole

Where does the electrical impulse pass down through after Ventricular Systole?

Bundle of His

What are the smaller bundles that the impulse passes through?

Purkinje fibres

What is the final result of an impulse?

Total Diastole

What is the Diastole phase?

Relaxation

What is Systole?

The Contraction phrase

What does the sympathetic nervous system?

Stimulates the heart to beat faster

What does the parasympathetic nervous system?

Returns the heart to its resting level

What are the systems coordinated by?

Cardiac Control Centre

Where is the Cardiac Control Centre?

Medulla Oblongata

What do chemoreceptors detect?

An increase in carbon dioxide and lactic acid

An increased concentration of carbon dioxide stimulates which system?

Sympathetic

What do Baroreceptors detect?

An increase in blood pressure

What do Proprioceptors detect?

An increase in muscle movement

Where do the receptors send an impulse to?

Cardiac Control Centre

Where does the cardiac Control Centre send an impulse too?

To either the sympathetic or parasympathetic nervous system

What does the Parasympathetic system do to the heart rate?

Decreases

What happens to the heart rate when the sympathetic nervous system is stimulated?

Increases

What stress hormones are released by the adrenal glands?

Adrenaline and Noradrenalin

A stress induced adrenaline response results in?

An increase in blood pressure

What is intrinsic control?

When temperature increases and blood become more viscous