Describe the control of epinephrine release

Control of Epinephrine Release First, epinephrine is released by the adrenal medulla (and not by the cortex). Secretion of adreno-medullary hormones is controlled solely by sympathetic input to the gland. When the sympathetic nervous system becomes activated under conditions of stress or fear, it concomitantly triggers a surge of adreno-medullary hormone release. The blood levels […]

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What are the major roles of epinephrine in the body?

This post shall discuss the main biological actions epinephrine has on the body. The functions of norepinephrine will come in another post. Epinephrine, like norepinephrine, is not essential for life, but virtually all organs of the body are affected by these catecholamines. Epinephrine plays important roles in 1. Mounting stress response 2. regulation of arterial […]

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What is the relationship of the adrenal medulla to the sympathetic nervous system?

First, observe that there are two endocrine organs in the adrenal glands, one (adrenal cortex) surrounding the other (adrenal medulla). The adrenal medulla is actually a modified part of the sympathetic nervous system… A sympathetic pathway is made up of two neurons in sequence a preganglionic neuron that originates from the CNS and the axonal […]

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