chapter 12 - nervous tissue Flashcards
what makes up the central nervous system?
the brain and spinal cord
what makes up the peripheral nervous system?
everything outside of the central nervous system
what makes up the somatic nervous system?
skeletal muscle
what makes up the autonomic nervous system?
smooth muscle, cardiac muscle, and glands
what carries out all functions of the nervous system?
neurons
what supports, nourishes, and protects neurons?
neuroglia
what are the three parts of a neuron?
cell body, dendrite, and axon
where is the nucleus and cytoplasm located in a cell?
cell body
what is the receiving end of a neuron?
dendrite
do dendrites conduct impulses away from or towards the cell body?
towards the cell body
do axons conduct impulses away from or towards the cell body?
away from the cell body
where are multipolar neurons?
spinal cord
what are bipolar neurons used for?
special senses (smell, taste, etc)
what neuron conducts sensory?
unipolar
where do sensory neurons convey acton potentials?
into CNS (unipolar)
where do motor neurons convey action potentials?
away from the CNS (multipolar)
what does afferent mean?
towards
what does efferent mean?
away from
what part of the brain and spinal cord contain myelinated axons?
white matter
what part of the brain and spinal cord contain cell bodies, dendrites, and unmyelinated axons?
gray matter
what is the act of a nerve firing?
action potential
is sodium inside or outside of the cell?
outside, wants to go in
is potassium inside or outside of the cell?
inside
what is the resting membrane potential?
-70
