AnaPhys (Nervous, Endocrine, Cardiovascular)

• most highly organized system of the body • concerned with the reception of stimuli, transmission of impulses, interpretation of sensation and the integration of sensations from both the internal and the external environment • Information received must be organized and stored, as well as used in the initiation of activity in effectors • composed of the brain, spinal cord and nerves

• basic unit of the nervous system • consists of the cell body and all its processes, the dendrites and axons

parts of a neuron

nerve cell process that conducts impulses toward the cell body

contains the nucleus and other cellular parts of the neuron

conducts impulses away from the cell body

what is the axon called

• point of contact between the neurons • provides continuity from one neuron to the next

cell’s life support center

electrical signal traveling down the axon

covers the axon of some neurons and helps speed neural impulses

form junctions with other cells

Neurons classification acc. to the direction of the impulse conduction

transmit impulses from effector organ to the spinal cord or brain

transmit impulses away from the brain or spinal cord towards muscles or glands

connect various neurons within the brain and spinal cord

effector organs could be what

Classification of neurons acc. to number of extensions from the soma

1 axon and several dendrites

where are multipolar neurons found

1 axon and 1 dendrite

where are bipolar neurons found

one process (divides with one part acting as an axon and the other one as a dendrite)

where are unipolar neurons found