Autonomic Nervous System
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Fight/flight response
Cardiac output increase BLood diverted to skeletal muscle (Quads Body temp rises so sweating must increase Peripheral vasodilation to allow heat loss
Describe ANS
Connection between CNS and peripheral organs Involuntary Sympathetic/parasympathetic Opposing effects on a tissue Two neurone system
Length of parasympathetic/sympathetic FIRST nerves
Parasympathetic - Long Symapthetic - short
What is a ganglia
Gap between two nerves Close to spine for sympathetic In target organ for parasympathetic
Origins of parasympathetic/sympathetic nerves
Para - Cranial saccral Symp - Thoracic lumbar
Motor nerves vs para/sympathetic nerves
Motor nerves heavily myelinated Para/sympathetic lightly myelinated
Parasympathetic nerves
Come out of the face Cranial nerve 3 Pupil Cranial nerve 7 Submaxillary, sublingual, lacrimal glands Cranial nerve 9 Parotid glands Cranial nerve 10 - Heart kidneys bronchi GI tract colon Sacral nerves - Remainder of GI tract, bladder, genitalia
Chemical at terminal of second nerves
Acetylcholine - Parasympathetic Noradrenaline - Sympathetic One exception - Sympathetic - Sweat gland - Acetylcholine
Where is nicotinic receptor
Ganglia
ACetylcholine broken down by
Cholineesterase
Noradrenaline metabolised by
Monoamine oxidase Catechol-O-methyl transferrase
Where is noradrenaline metabolised
In the neurone
Nitric oxide
Erection