nervous Flashcards
Nervous system is anatomically divided into two:
CNS
PNS
components of CNS
brain and spinal cord
components of PNS
12 pairs of cranial nerves and 31 pairs of spinal nerves, and their associated ganglia
Nervous system is functionally divided into two:
Somatic
Autonomic/ Visceral
composed of neurons and ganglia
Nervous system
what does CNS contain?
relay neurons (interneurons)
what does PNS contain?
sensory neurons
motor neurons
neurotransmitter that is responsible for the action potential of skeletal
muscle to progress
Acetylcholine (ACh)
TRUE OR FALSE: for a muscle to move, ACh needs to be released from the spinal nerve
True
Dilates pupils
Sympathetic
Stimulates saliva flow
Parasympathetic
Relaxes bronchi
Sympathetic
Constricts bronchi
Parasympathetic
Slows heartbeat
Parasympathetic
Inhibits peristalsis and secretion
Sympathetic
Stimulates glucose production and release
Sympathetic
Secretion of adrenaline (norepinephrine) and noradrenaline
Sympathetic
Stimulates bile release
Parasympathetic
Inhibits bladder contraction
Sympathetic
Stimulates orgasm
Sympathetic
Structural and functional units of the nervous system (neuron doctrine)
Neurons
Components of neurons
cell bodies, dendrites, axons
component of neuron located in the gray matter of CNS
Cell bodies
Classification of Neurons Based on Structure
unipolar, bipolar, multipolar
Where are sensory neurons of the PNS found?
in spinal and cranial nerve ganglion
Where are bipolar neurons found?
Found in the olfactory epithelium, the retina, and the inner ear
true or false: Majority of type of neurons are multipolar neurons.
true
Uncommon neuron
Anaxonic neuron