Physiology lecture 1 0.0 / 5 ? BiologyHomeostasis and autonomic nervous systemUniversityNone Created by: willmiddlehamCreated on: 02-04-15 17:00 How long is the pre/post ganglionic nerves in the parasympathetic system? Long presynaptic, short postsynaptic 1 of 13 How long is the pre/post ganglionic nerves in the sympathetic system? Short presynaptic, long postsynaptic 2 of 13 Where is the preganglionic origin in parasympathetic system? Cranial nerve, pelvic nerve 3 of 13 Where is the preganglionic origin in sympathetic system? Thoracic 4 of 13 Name the two cholinergic receptors and the two adrenergic receptors... Cholinergic: nicotinic and muscarinic Adrenergic: alpha or beta 5 of 13 Where is the nicotinic receptors located? In both the para and sympathetic nervous system 6 of 13 Where is the muscarinic receptors located? Target organ synapse on parasympathetic 7 of 13 What is the nicotinic and muscarinic receptors blocked by? Nicotinic: curare Muscarinic: atropine 8 of 13 Where is the alpha 1 adrenoreceptors located? What does it cause? What causes the greater effect NAdr or Adr? Postsynaptic (sympathetic), vasoconstriction and smooth muscle contraction, NAdr > Adr 9 of 13 Where is the alpha 2 adrenoreceptors located? What does it cause? What causes the greater effect NAdr or Adr? What blocks it? Presynaptic (sympathetic), reduction in adrenergic/cholinergic transmission, NAdr > Adr 10 of 13 Where is the beta 1 adrenoreceptors located? What does it cause? What causes the greater effect NAdr or Adr? Heart, increased heart rate and force of contraction, Adr = NAdr 11 of 13 Where is the beta 2 adrenoreceptors located? What does it cause? What causes the greater effect NAdr or Adr? Causes vasodilation and smooth muscle relaxation, Adr > NAdr 12 of 13 What blocks alpha receptors and beta receptors? Alpha blocked by phentolamine, beta blocked by propranolol 13 of 13
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