Cheat Sheet 1 - Adrenergic Epinephrine norepinephrine...

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Adrenergic Epinephrine, norepinephrine - Sympathetic “fight or flight” - Effects = stimulation of heart, vasoconstriction of skin, bronchodilation, glycogenolysis - alpha and beta (both have 2 subtypes) Cholinergic Nerve endings that release acetylcholine as a neurotransmitter (PNS) - Parasympathetic nerve effects; promoted by muscarine; inhibited by atrophine Autonomic pre-ganglionic neurons - Sympathetic (spinal cord b/t thoracic + lumbar levels) -- synapse post-g neurons cell bodies in double chain of sym-g (paravertebral) outside s.c. ; synapse collateral (prevertebral) g (celiac, superior mesentric, inferior mesentric g); innervate adrenal medulla (epi/norepi) - Parasympathetic (brain and sacral levels of spinal cord) --cranial nerves III, VII, IX, X ; long pre-g fiber innervate terminal g within organ; short post-g fiber innervate effector cells; vagus nerve = para. innervation Cutaneous effectors (receptors) Free nerve endings : touch, hot, cold, nociception(pain): hair follicles, skin Merkel's disc : sustained touch and pressure: base of epidermis (stratum basale) Ruffini corpuscles
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