- contains the Brain and Spinal cord
- receives sensory input and delivers motor output
Central nervous system (CNS)
- contains the nerve and ganglion
- delivers information to the CNS and responsible for motor output
Peripheral nervous system (PNS)
2 parts of PNS
Somatic nervous system
and Autonomic nervous system
responsible to voluntary movement and associated with the skeletal muscle
Somatic nervous system
responsible for involuntary movement and associated with smooth muscle, cardiac muscle, and glands.
Autonomic nervous system
interacting in the neurons
Synapse
Cell body
soma
receive information in the neurons
Dendrites
allows conduction of nerve impulses
Myelin sheath
carries nerve impulses away from the cell body. The output for nuerons
Axon
periodic gap in the insulating sheath (myelin) on the axon of certain neurons that serves to facilitate the rapid conduction of nerve impulses.
node of Ranvier
- Rest or Digest
- Smooth muscle, cardiac muscle, and
glands
Parasympathetic Nervous System
- Fight or Flight
- Smooth muscle, cardiac muscle, and glands
Sympathetic
nervous system
- embedded in the lining of the gastrointestinal system, beginning in the esophagus and extending down to the anus.
- Smooth muscle and glands of GI tract
Enteric nervous system
- responsible for providing synapses between neurons.
- contains specialized chemicals called neurotransmitters that are initially contained inside the synaptic vesicles.
Axon Terminal
Functions of the Nervous System
- Sensory - sense changes through sensory receptors
- Motor - respond to stimuli
- Integrative - analyze incoming sensory information, store some aspects, and make decisions regarding appropriate behaviors
- Electrically excitable
- The fundamental units of the brain and nervous system,
Neurons
Neurons can be classified based on the number of processes extending from the cell body. What are the 3 types of Structural Classification of Neurons?
- Multipolar neuron
- Bipolar neuron
- Unipolar neuron
