KINESIOL 1A03 Lecture Notes - Lecture 22: Adrenergic Receptor, Medulla Oblongata, Enteric Nervous System
14 Dec 2015
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Document Summary
Sympathetic: thoracolumbar division, t1-l2, sympathetic ganglia chains on either side of the vertebral column. Preganglionic cell body in lateral horn of gray matter. Parasympathetic: craniosacral division, cranial nerves iii, vii, Enteric: nerve plexuses in the wall of the digestive tract. 3 points of nervous input into the digestive tract: digestive cns, ans motor neurons connect the cns digestive tract, enteric neurons control through autonomic reflexes. Enteric: major types of enteric neurons, enteric sensory neurons stretch, chemical composition, enteric motor neurons smooth muscle, glands, enteric interneurons connect sensory and motor. Neurotransmitters: sympathetic and parasympathetic neurons secrete either, acetylcholine (cholinergic, norepinephrine (adrenergic) Adrenergic receptors: 2 classes, alpha receptors (a1, a2, beta receptor (b1, b2, diverse actions dependent on the receptor and the tissue. Ans regulation: ans homeostasis, autonomic reflexes, baroreceptors. Increase in blood pressure detected by carotid baroreceptors. Heart rate decreases, causing blood pressure to decrease. Heart rate increases, causing blood pressure to increase. Decrease in blood pressure detected by carotid baroreceptors.
