Chapter 29: Nervous System Flashcards
the 2 main parts of the nervous system
central (CNS) and peripheral (PNS)
sensory nerves responsible for detecting info from inside or outside the body, and sending the info to the CNS
afferent nerves
motor nerves that take information or impulses from the CNS to the PNS to control muscles or glands
efferent nerves
a neuron may have more than one ____, but usually only one ____.
dendrites; axons
the short branching structures near the cell body
dendrites
the long structure that branches at the end furthest from the cell body
axon
____ cells wrap around the axon to form the myelin sheath
schwann
what 2 ions are both +/- charged, and important for generating nerve impulses
sodium and potassium
when a neuron is _____, it creates a nerve impulse/electric current
depolarized
the ____ ___ releases neurotransmitters to transport the nerve impulse from the axon to the dendrites of other neurons
synaptic knob
the tight net of capillaries in the CNS form the ___ ___ ___
blood brain barrier
the membranes that protect the brain and spinal cord
meninges
the toughest, outermost meninge
dura mater
the space above the dura mater
epidural space
the space below the dura mater
subdural space
