module 6 Flashcards
sympathetic function
fight or flight
parasympathetic function
rest and digest
somatic nervous system control centre
primary motor cortex
somatic nervous system central neurons
upper motor neuron
somatic nervous system peripheral motor neurons
lower motor neuron
somatic nervous system target
skeletal muscles
somatic nervous system function
voluntary movement, somatic reflexes
autonomic nervous system control centre
hypothalamus
autonomic nervous system central neurons
CNS interneurons
autonomic nervous system peripheral motor neurons
pre and post glanglionic neurons
autonomic nervous system target
cardiac muscle, smooth muscle, glands
autonomic nervous system function
involuntary control, visceral reflexes
somatic NS location of cell body
motor nucleus in anterior grey horn of spinal cord, brainstem nucleus
somatic NS NT release
ACh
somatic NS effect of NT on target
excitatory - skeletal muscle activity increases
autonomic NS preganglionic location
motor nucleus in lateral grey horn, brainstem nucleus
autonomic NS preganglionic NT released
ACh
autonomic NS pregagnlionic effect of NT on target
excitatory - stimulates action potential in postganglioninc neuron
autonomic NS postganglionic location
peripheral ganglion
autonomic NS postganglionic NT released
ACh or NA
autonomic NS postganglionic effect of NT on target
excitatory - target activity increase, inhibitory - target activity decreases
parasympathetic size of axons
preganglionic axon - long, postganglioninc axon - short
sympathetic size of axons
preganglionic axon - short, postganglioninc axon - long
adrenal medulla
enhance and prolong the sympathetic response
preganglionic neurons release
ACh
postanglioninc neurons release
sympathetic - NA, parasympathetic - ACh
receptors that bind acetylcholie (ACh) are called
cholinergic
receptors that bind noradrenaline (NA) are called
adrenergic
2 subtypes of cholinergic receptors
nicotinic and muscarinic
2 subtypes of adrenergic receptors
alpha, beta
beta 1 location
heart
beta 1 effect of NT binding
excitatory - increases heart rate and contractions
beta 1 location
airways, blood vessels (heart, liver, skeletal muscle), digestive tract, urinary organs
beta 1 effect of NT binding
inhibitory - decreased activity
alpha 1 location
blood vessels (except heart, liver, skeletal muscles), all sympathetic targets
alpha 1 effect of NT binding
excitatory - increased activity
agonists
drugs that mimic the action of the NT - promote normal response
antagonists
drugs that bind the receptors and block the action of NT - prevent normal response
biogenic amines
noradrenaline, dopamine, serotonin
amino acids
GABA, glutamate
neutopeptides
substance P, endorphins