Control of Heart Rate (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does the autonomic nervous system control?
What does the autonomic nervous system control?
Involuntary activities of muscles/glands
Which division of the autonomic nervous system stimulates the fight or flight response?
Which division of the autonomic nervous system stimulates the fight or flight response?
Sympathetic nervous system
What does it mean that the sympathetic and parasympathetic systems are antagonistic?
What does it mean that the sympathetic and parasympathetic systems are antagonistic?
Their actions oppose each other
What does myogenic mean in relation to cardiac muscle?
What does myogenic mean in relation to cardiac muscle?
Contractions originate within the muscle
Where is the sinoatrial node (SAN) located?
Where is the sinoatrial node (SAN) located?
In the right atrium wall
What structure conducts electrical waves from the AVN to the ventricles?
What structure conducts electrical waves from the AVN to the ventricles?
Bundle of His (Purkyne tissue)
Which brain region controls modifications to heart rate?
Which brain region controls modifications to heart rate?
Medulla oblongata
Where are chemoreceptors that detect blood pH changes located?
Where are chemoreceptors that detect blood pH changes located?
In the carotid artery walls
What happens when chemoreceptors detect decreased blood pH from high CO2?
What happens when chemoreceptors detect decreased blood pH from high CO2?
Heart rate increases via sympathetic
How do pressure receptors respond when blood pressure exceeds normal levels?
How do pressure receptors respond when blood pressure exceeds normal levels?
Trigger parasympathetic to lower rate