Answer the following: Describe the mechanisms by which acetylcholine affects heart rate. Describe the mechanisms by which epinephrine...

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Answer the following:

Describe the mechanisms by which acetylcholine affects heartrate.

Describe the mechanisms by which epinephrine affects heartrate.

Describe the mechanisms by which atropine followed byacetylcholine affects heart rate.

Epinephrine mimics the effects of which branch of the autonomicnervous system?

Compare the effect of acetylcholine on cardiac muscle with itseffect on skeletal muscle. Can you explain the mechanistic basisfor the difference?

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1 Acetylcholinebisvtge neurotransmitter released by parasympathetic nervous system via vagus nerve at synapses with cardiac muscle cellsThe acetylcholine binds to M2 receptors in the cells of cardiac muscle Ach hyperpolarises the SA nodal cells and decreases the rate of diastolic depolarisationAs a result rate of impulse generation is    See Answer
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