Control of heart rate
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What does CCC stand for? | Cardiac control centre
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| Where is the CCC? | In medulla in brain
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| What are the two parts to the autonomic nervous system? | Sympathetic and parasympathetic
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| What part of the autonomic nervous system sends signals to decrease heart rate? | Parasympathetic via the vagus nerve
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| What part of the autonomic nervous system sends signals to increase heart rate? | Sympathetic via the accelerator nerves
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| Name three neural factors that inform the CCC when heart rate needs to in/decrease | Baroreceptors / Proprioceptors / Chemoreceptors
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| What are intrinsic factors which affect heart rate? | Temperature increases HR increases / Venous return increase HR increases
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| Where are proprioceptors found and what do they detect? | In muscles and tendons / movement
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| What are Baroreceptors and where are they found? | Found in walls of vena cava and aorta and detect increase in blood flow and blood pressure (stretch receptors)
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| What do chemoreceptors detect? | increase in blood acidity
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| What are intrinsic factors which affect heart rate? | Temperature increases HR increases / Venous return increase HR increases
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| What do thermoreceptors detect? | Changes in temperature
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| What does adrenalin do? | • Increasing heart rate & strength of contraction
• Constricting blood vessels
• Increases blood glucose by stimulating the break down of glycogen
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Created by:
Tina Dean
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