BPK 205 Lecture Notes - Lecture 10: Blood Vessel, Chromaffin Cell, Exocytosis

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Discuss how the autonomic nervous system (ans) helps maintain homeostasis: ho(cid:373)eostasis = (cid:271)ody"s te(cid:374)de(cid:374)(cid:272)y to (cid:373)ai(cid:374)tai(cid:374) a sta(cid:271)le a(cid:374)d (cid:272)o(cid:374)sta(cid:374)t e(cid:374)viro(cid:374)(cid:373)e(cid:374)t, a dynamic balance between the autonomic branches, mostly in between sympathetic and parasympathetic activities. Location of ans control centers in the brain: hypothalamus = right on top of pituitary glands. Describe the functional anatomy of the ans branches. Comparison of sympathetic (sns) vs parasympathetic (pns) anatomy & function: both are 2 neuron systems pre-ganglionic neuron synapse post-ganglionic neuron. Synapse target tissue /// ganglion = hub of cell bodies outside of cns: sns: originate in thoracic and lumbar segments of spinal cord; ganglions are close to spinal cord; short preganglionic neuron ganglion long postganglionic neuron. Trigger exocytosis of vesicle content (neurotransmitter) neurotransmitter bind to receptor or diffuse away or re-uptake or broken down by enzyme. Name the neurotransmitters and receptors of the ans branches. Nicotinic acetylcholine receptors ligand-gated channel, non-selective (permeable to na+ and.

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