1. If a patient has such a slow heart rate that not
enough blood circulates to the brain, which type of receptor agonist could be
administered to increase heart rate? Which type of receptor antagonist could be
administered?
2. Of the sympathetic preganglionic neurons and
postganglionic neurons, one has myelinated axons whereas the other is
unmyelinated. Based on the anatomy of the sympathetic nervous system in which
neuron is myelinated and which is unmyelinated?
3. Explain how binding of norepinephrine to _2 or
_1 receptors can produce an excitatory effect on the effector organ
even
1. If a patient has such a slow heart rate that not
enough blood circulates to the brain, which type of receptor agonist could be
administered to increase heart rate? Which type of receptor antagonist could be
administered?
2. Of the sympathetic preganglionic neurons and
postganglionic neurons, one has myelinated axons whereas the other is
unmyelinated. Based on the anatomy of the sympathetic nervous system in which
neuron is myelinated and which is unmyelinated?
3. Explain how binding of norepinephrine to _2 or
_1 receptors can produce an excitatory effect on the effector organ
even though _2 receptors inhibit production of cAMP whereas _1 receptors
stimulate production of cAMP.
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