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Earn +20 ptsQ: What adrenergic neurotransmitter receptor plays a role in heart activity?
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How do adrenergic agonists affect heart rate and the bronchial muscles?
Adrenergic agonists speed up the heart rate and relax the bronchial muscles.
Which neurotransmitters speed up or slow down the heart rate?
The chemical neurotransmitter, Acetylcholine attaches to what is known as a muscarinic receptor. This brings the body back to "rest and digest", and relaxes it from the "fight or flight" response.
Activation of which kind of receptor causes heart rate to increase?
beta-one receptor
Does the electrical activity of the heart precede mechanical activity?
Yes. It is the electrical activity that stimulates the mechanical activity.
Which is the neurotransmitter for the sympathetic nervous sytem that increases the heart rate to prepare for exercise of the fight or flight response?
epinephrine
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