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  2. Sympathoadrenal system - Wikipedia

    en.wikipedia.org/wiki/Sympathoadrenal_system

    Beginning in the sympathetic nervous system, an external stimulus affects the adrenal medulla and causes a release of catecholamines. The sympathoadrenal system is a physiological connection between the sympathetic nervous system and the adrenal medulla and is crucial in an organism's physiological response to outside stimuli. [1]

  3. Adrenal medulla - Wikipedia

    en.wikipedia.org/wiki/Adrenal_medulla

    The adrenal medulla is the principal site of the conversion of the amino acid tyrosine into the catecholamines; epinephrine, norepinephrine, and dopamine. Because the ANS, specifically the sympathetic division, exerts direct control over the chromaffin cells , the hormone release can occur rather quickly. [ 2 ]

  4. Sympathetic nervous system - Wikipedia

    en.wikipedia.org/wiki/Sympathetic_nervous_system

    Therefore, this response that acts primarily on the cardiovascular system is mediated directly via impulses transmitted through the sympathetic nervous system and indirectly via catecholamines secreted from the adrenal medulla. The sympathetic nervous system is responsible for priming the body for action, particularly in situations threatening ...

  5. Neuroendocrine cell - Wikipedia

    en.wikipedia.org/wiki/Neuroendocrine_cell

    An example of a neuroendocrine cell is a cell of the adrenal medulla (innermost part of the adrenal gland), which releases adrenaline to the blood. The adrenal medullary cells are controlled by the sympathetic division of the autonomic nervous system. These cells are modified postganglionic neurons. Autonomic nerve fibers lead directly to them ...

  6. Norepinephrine - Wikipedia

    en.wikipedia.org/wiki/Norepinephrine

    These sympathetic ganglia are connected to numerous organs, including the eyes, salivary glands, heart, lungs, liver, gallbladder, stomach, intestines, kidneys, urinary bladder, reproductive organs, muscles, skin, and adrenal glands. [17] Sympathetic activation of the adrenal glands causes the part called the adrenal medulla to release ...

  7. Neurohormone - Wikipedia

    en.wikipedia.org/wiki/Neurohormone

    Adrenomedullary hormones are catecholamines secreted from the adrenal medulla by chromaffin cells, neurosecretory cells connected to the central nervous system. [10] The synthesis, storage (in chromaffin cells) and release of catecholamines is co-regulated by synaptic input from their respective pre-synaptic sympathetic neurons, as well as ...

  8. How to answer questions about your body this holiday season ...

    www.aol.com/answer-questions-body-holiday-season...

    It's the most wonderful—and stressful—time of the year. While the holiday season can be joyful, gatherings with family, friends, and colleagues inevitably come with some awkward encounters.

  9. Adrenal gland - Wikipedia

    en.wikipedia.org/wiki/Adrenal_gland

    The adrenal medulla is driven by the sympathetic nervous system via preganglionic fibers originating in the thoracic spinal cord, from vertebrae T5–T11. [20] Because it is innervated by preganglionic nerve fibers, the adrenal medulla can be considered as a specialized sympathetic ganglion. [20]