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Terms in this set (14)
inner portion of the adrenal gland
- "fight or flight"
located inside the adrenal cortex in the center of an adrenal gland
- associated with the sympathetic nervous system
BUT also,
- consists of sympathetic paraganglia made of chromaffin cells
- sympathetic paraganglion whose cells secrete neurotransmitters (epinephrine and norepinephrine into capillaries instead of synapses)
- produces "stress hormones," including adrenaline via neuronal stimulation
- affects available energy, heart rate, and metabolism
- secretes catecholamines including epinephrine, norepinephrine, and dopamine
- "fight or flight"
located inside the adrenal cortex in the center of an adrenal gland
- associated with the sympathetic nervous system
BUT also,
- consists of sympathetic paraganglia made of chromaffin cells
- sympathetic paraganglion whose cells secrete neurotransmitters (epinephrine and norepinephrine into capillaries instead of synapses)
- produces "stress hormones," including adrenaline via neuronal stimulation
- affects available energy, heart rate, and metabolism
- secretes catecholamines including epinephrine, norepinephrine, and dopamine
1. Stimuli travel through the sympathetic nervous system by means of preganglionic nerve fibers that emerge from the thoracic spinal cord
2. Electrical impulses carried by the sympathetic nervous system are converted to a chemical response in the adrenal gland
3. Chromaffin cells contained in the adrenal medulla act as postganglionic nerve fibers that release this chemical response (catecholamines such as epinephrine & norepinephrine) into the blood as circulating messenger
4. The sympathoadrenal system can activate and discharge chemical messengers to activate an organism's "fight or flight" response
5. This "sympathoadrenal discharge" causes an increase in heart rate, cardiac output, blood pressure, and glucose levels
Summarize:
- adrenal medulla is in effect a sympathetic paraganglion
- cells secrete hormones when stimulated by the
preganglionic nerve fibers
2. Electrical impulses carried by the sympathetic nervous system are converted to a chemical response in the adrenal gland
3. Chromaffin cells contained in the adrenal medulla act as postganglionic nerve fibers that release this chemical response (catecholamines such as epinephrine & norepinephrine) into the blood as circulating messenger
4. The sympathoadrenal system can activate and discharge chemical messengers to activate an organism's "fight or flight" response
5. This "sympathoadrenal discharge" causes an increase in heart rate, cardiac output, blood pressure, and glucose levels
Summarize:
- adrenal medulla is in effect a sympathetic paraganglion
- cells secrete hormones when stimulated by the
preganglionic nerve fibers
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