Voorbeelden van adrenal medulla

• The adrenal medulla produces neurotransmitters, namely, the catecholamines, epinephrine, and norepinephrine.

• These biological responses are mediated both by direct autonomic innervation of target organs by postganglionic neurons and by secretion of epinephrine and norepinephrine by the adrenal medulla.

• Release of the hormones epinephrine and norepinephrine from the adrenal medulla of the adrenal glands is part of the fight-or-flight response.

• Nicotinic receptors cause the release of catecholamine from the adrenal medulla, and also site specific excitation or inhibition in brain.

• The two exceptions mentioned above are postganglionic neurons of sweat glands and chromaffin cells of the adrenal medulla.

• Using immunohistochemistry, synaptophysin can be demonstrated in a range of neural and neuroendocrine tissues, including cells of the adrenal medulla and pancreatic islets.

• Because it is innervated by preganglionic nerve fibers, the adrenal medulla can be considered as a specialized sympathetic ganglion.

• These substances are released in the adrenal medulla, which is richly vascular.

• The neural crest of the ectoderm develops into: peripheral nervous system, adrenal medulla, melanocytes, facial cartilage, dentin of teeth.

• At seven weeks of gestation, the adrenal cells are joined by sympathetic cells that originate from the neural crest to form the adrenal medulla.

• In the adrenal medulla, acetylcholine is used as a neurotransmitter, and the receptor is of the "nicotinic" type.

• The adrenal medulla is considered a sympathetic ganglion and, like other sympathetic ganglia, is supplied by cholinergic preganglionic sympathetic fibers; acetylcholine is its neurotransmitter.

• They are concentrated near the adrenal glands and essentially function the same way as the adrenal medulla.

• The adrenal medulla is derived from ectodermal cells.

• Neuroblastoma and pheochromocytoma are the two most important tumors which arise from the adrenal medulla.