The nervous system
_________ reflexes involve skeletal muscles
Somatic
The part of the peripheral nervous system that brings information to the central nervous system is the
afferent division
The layer of lipid around an axon is called ________
myelin
soma
neuron cell body
The region of the brain that is involved in conscious thought and intellectual function as well as processing somatic sensory and motor information is the
cerebrum
dopamine
neurotransmitter
The gaps between adjacent Schwann cells along the length of an axon called
nodes
The projections of gray matter toward the outer surface of the spinal cord are called
horns
All of the nervous tissue outside of the central nervous system comprises the ________ nervous system
peripheral
neuroglia
provide (s) a supporting framework
exteroceptor
provide (s) information about the external environment
The most rapid action potentials are conducted on
thick, myelinated axons
Most neurons in the brain are
multipolar
Which of the following is a function of the motor division of the nervous system?
sending signals to muscles
Information received by the brain concerning internal or external environmental condition is called a (n)
sensation
The specialized membranes that protect the spinal cord are termed
spinal meninges
Neurotransmitters are released from the
synaptic terminals/knobs
Aggregations of ribosomes in neurons are referred to as
Nissl bodies
The neurilemma of axons in the peripheral nervous system is formed by
Schwann cells
The dural sinuses are located in the
dura mater
The glial cells responsible for maintaining the blood-brain barrier are the
astrocytes
Neurons that have one axon and one dendrite with the soma between them are called
bipolar
Synaptic knobs occur at the ends of
dendrites
The cerebrum is separated from the cerebellum by the
transverse fissure
The ________ division of the nervous system brings sensory information to the central nervous system
afferent
The all-or-none principle states that
all stimuli great enough to bring the membrane to threshold will produce identical action potentials
The brain and spinal cord comprise the
central nervous system
Which of the following is a function of neurons?
information processing
In general, the nervous system
is fast acting
astrocytes
largest and most numerous type of glial cells
The myelin sheaths that surround the axons of some of the neurons in the CNS are formed by
oligodendrocytes