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Science Vocab 147928

Question	Answer
two types of cells that make up neural tissue	neurons, neuroglical cells
nervous system divided into 2 divisions what are they	CNS and PNS
the ____ nervous system contains brain and spinal cord	central
the _____ nervous system contains the spinal and cranial nerves	peripheral
list 2 divisons of the peripheral nervous system	sensory and motor
list 2 divisions of the motor divison	autonomic and somatic
which division of motor carries impulses to heart	autonomic
which divison of motor carries impulses to skeletal muscles	somatic
which division of peripheral n.s carries impulses to the muscles and glands	motor
which division of PNS picks up sensory info and sends it to the CNS	sensory
what is meant by the terms efferent and afferent	e= sends impulses away from CNSA= sends impules to CNS
___ neurons carry impules away from CNS	motor
___ neruons carry impulses towards the CNS	sensory
nerve impulses travel from neuron to neuron at junctions called	synapse
at resting membrane potential the ions are	polarized
if mem. has become more neg. it has become	hyperpolarized
if mem. has become less neg it has become	depolarized
the adding of stimuli to each other is called	summation
when stimuli add up to the point of producing an action potential it is known as a ___ stimulus	threshold