Nervous System Flashcards
Central NS consists of
brain and spinal cord
2 parts of peripheral NS
motor (efferent) and sensory (afferent)
Somatic NS controls
sk mus contractions, consciously controled
Autonomic NS controls
sm muscle contractions and is unconsciously controlled
2 parts of the autonomic NS
sympathetic and parasympathetic NS
Sympathetic NS increases in activity
during stress/excitement
Parasymphatetic NS increases in activity
during rest and relaxation
Sympathetic NS neurons:
short preganglionic neurons and long postganglionic neurons
Parasympathetic NS neurons:
long preganglionic neurons and short postganglionic
Sympathetic NS preganglionic neurons extend from
spinal cord
Parasympathetic NS preganglionic neurons extend from
brainstem
the relative amount of stimulation by symp NS and parasymp NS in the body
autonomic tone
fight or flight response is due to
symp NS
rest and digest is due to
parasymp NS
Autonomic tone is regulated by
hypothalamus
neurons that release ACH as their neurotransmitter
cholinergic
receptors proteins that bind and are activated by ACH
cholinergic
2 types of cholinergic receptors
nicotine and muscarine
receptors that bind/activated by nicotine and ACH
nicotine Receptors
receptors that bind/activated by muscarine and ACH
muscarinic
cholinergic is relating to
ACH
adrenergic is relating to
adrenaline or NE
neurons that release NE as the neurotransmitter
adrenergic
receptor proteins on the cell surface that bind/activated by epi/NE
adrenergic
2 types of adrenergic receptors
alpha and beta
a drug/toxin that binds/activates a type of receptors
agonist
drug/toxin that binds to a receptor and blocks receptors activation
antagonist
