Nervous System Flashcards
What kind of nerve carries impulses TO the CNS?
Sensory
Another word for “Motor” neuron
Efferent
The portion of the cerebellum responsible for vision
Occipital
The void running down the center of the spinal cord
Central Canal
The ___ nervous system contains all the nerves that affect the skeletal muscles and sensory organs
Somatic
the “involuntary” part of the nervous system
Autonomic
shorter branches of a neuron which receives nerve impulses
Dendrites
part of cerebellum responsible for hearing and smelling
Temporal
___ matter in the spinal cord contains bundles of myelinated axons
White
The portion of the cerebrum responsible for thinking
Frontal Lobe
The central part of the neuron, where most activities related to the maintenance of the cell occur
Cell Body
When sodium and potassium ions are being returned to their resting potential
Refractory
the portion of the nervous system not in the CNS
PNS
what connects the two sides of the brain
Corpus Callosum
the type of ion IN the cell during resting potential
Potassium
the ending at the end of the Axon
Synaptic (also referred to as Axon terminals)
The long part attached to a nerve cell
Axon
the spaces between the myelinated sections of the axon
Nodes of Ranvier
stage of action potential where sodium ions begin to move into the cell
Depolarization
during resting potential, the type of ion outside the cell
Sodium ion
the “master gland”
Pituitary gland
the coated portion of the axon
Schwann Cells
the portion of the brain for understanding speech
Parietal
after action potential, ions are moved back to their spots by
active transport
large portion of the brain stem
Medulla Oblongata
the substance that coats part of the axons
Myelin
synaptic ____ contains the neurotransmitters at the axon ends
Vesicles
an involuntary action that bypasses the brain
Reflex
the 3 protective layers around the spinal cord
Meninges
the ventral root conducts nerve impulses ____ from the spinal cord
Away
_____ transmission occurs because of the Schwann cells
Saltatory
The space between neurons (between axon ends and dendrites of the next cell)
Synapse
____ is found in the central canal and around the spinal cord
Spinal fluid
part of the brain responsible for conscious thought
Cerebrum
_____ transmitters make it more likely to produce an action potential
Excitatory
A type of neuron only found in the CNS
Interneuron
there are ____ cranial nerves/hairs attached to the brain
Twelve
another word for “sensory” neuron
Afferent
a neurotransmitter that puts you into a relaxed state
Acetylcholine
the portion of the nervous system that puts you into a relaxed state
Parasympathetic
the stage of action potential where potassium ions start to move OUT of the cell
Repolarization
a neurotransmitter that’s released to induce “fight or flight”
Noradrenalin
there are 31 pairs of ____ nerves
Spinal
the name for “nerve impulse”
Action Potential
the voltage inside a neuron at resting potential is around
-70
these break down neurotransmitters
Enzymes
the sodium/potassium pump requires energy in the form of ___
ATP
a chemical that is released to transmit a nerve impulse from one nerve cell to the next
Neurotransmitters
_____ transmitters make it less likely for there to be an action potential
Inhibitory
the part of the nervous system responsible for “fight or flight”
Sympathetic
the dorsal root looks different from the ventral root because of an enlargement called the dorsal root ____
Ganglion
____ Matter contains cell bodies
Grey
part of the brain responsible for balance
Cerebellum
part of the brain responsible for homeostasis
Hypothalamus
the dorsal root conducts nerve impulses ____ the spinal cord
Towards
the part of the brain that receives all the information from the senses (except smell)
Thalamus
Nerves are bundles of individual cells called
Neurons
____ neurons carry nerve impulses away from the CNS
Motor
