nervous system

describe the anatomy and physiology of the nervous system

central nervous system

part of the nervous system that acts as the command center for all communication and actions of the body

peripheral nervous system

part of the nervous system that allows signals to be sent by the brain

what 2 things does the central nervous system consist of

brain and spinal cord

what 2 things does the peripheral nervous system consist of

nerves and ganglia

2 parts of the nervous system

central nervous system and peripheral nervous system

axon

a nerve fiber that carries a nerve impulse away from the neuron cell body

function of nerves

transmit signals from the central nervous system

4 neuron binding steps

1. electrical impulses are generated to create graded electrical impulse signals

2. if strong enough, the impulse travels along the axon

3. chemical neurotransmitters are secreted from the axon terminals into the synapse

4. neurotransmitters will bind to either another neuron or a muscle cell

where are graded electrical impulses generated in a neuron

dendrites

dendrite

nerve fiber that carries a nerve impulse towards the neuron cell body

function of synapse

allows neurons to pass signals to other neurons, muscles, or glands`

function of sensory (afferent) neurons

send messages to the central nervous system about sensory information

what 3 things does sensory information consist of

touch, smell, pain

function of motor (efferent) neurons

send messages to muscle

2 types of motor (efferent) neurons

autonomic (involuntary) motor nervous system and somatic (voluntary) nervous system

function of autonomic nervous system

controls involuntary actions

function of somatic nervous system

controls voluntary actions

what is each muscle fiber connected to

nerve fiber`