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One function of the nervous system is to send information to and receive information from all parts of the body.
TRUE
Myelin not only insulates the neuron, it also slows down the neural message helping with transmission of messages traveling down the axon.
FALSE
The occipital lobes contain the visual cortex, where visual signals are processed.
TRUE
The cerebrum is divided into two hemispheres that control opposite sides of the body.
TRUE
The pathway from the retina to the brain that enables us to see is rods and cones to bipolar cells to ganglion cells to optic nerve.
TRUE
a nerve cell in the nervous sytem
neuron
fiber attached to the soma, its job is to carry messages out to the other cells
axon
the network of nerve cells and fibers which transmits nerve impulses between parts of the body.
nervous system
transmit signals to the dendrites
axon terminal (terminal buttons)
cell body
soma
its stable, negative charge when the cell is inactive (-70mV)
resting potential of a neuron
chemicals that transmit information from one neuron to another
neurotransmitters
microscopic fluid-filled space between the axon terminal of one cell and the dendrites or surface of the next cell
Synapse (synaptic gap)
the part of the peripheral nervous system that controls the glands and the muscles of the internal organs (such as the heart). Its sympathetic division arouses; its parasympathetic division calms.
autonomic nervous system (ANS)
tends to calm the body by slowing the heart and breathing and by allowing the body to recover from the activities that the sympathetic system causes "rest and digest" (part of ANS)
parasympathetic division of the ANS
neurons that carry incoming information from the sensory receptors to the brain and spinal cord
sensory (afferent) neurons
