3) Ciliated CNS neuroglia that play an active role in moving the cerebrospinal fluid are called
________.
A) ependymal cells B) Schwann cells
C) oligodendrocytes D) astrocytes
A

The sheath of Schwann is also called the ________.
A) myelin sheath
B) axolemma
C) neurilemma
D) white matter
C

An excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle is
________.
A) cholinesterase
B) norepinephrine
C) acetylcholine
D) gamma aminobutyric acid
C

The period after an initial stimulus when a neuron is not sensitive to another stimulus is the
________.
A) resting period
B) repolarization
C) depolarization
D) absolute refractory period
D

10
Which of the following is not a structural feature of a neuron?
A) synaptic cleft
B) Nissl bodies
C) dendrites
D) axon
A

The part of a neuron that conducts impulses away from its cell body is called a(n) ________.
A) axon
B) dendrite
C) neurolemma
D) Schwann cell
A

The point at which an impulse from one nerve cell is communicated to another nerve cell is the
________.
A) cell body
B) synapse
C) receptor
D) effector
B

The role of acetylcholinesterase is to ________.
A) act as a transmitting agent
B) amplify or enhance the effect of ACh
C) destroy ACh a brief period after its release by the axonal endings
D) stimulate the production of serotonin
C

Which of the following is not a function of the autonomic nervous system?
A) innervation of smooth muscle of the digestive tract
B) innervation of cardiac muscle
C) innervation of glands
D) innervation of skeletal muscle
D

Collections of nerve cell bodies outside the central nervous system are called ________.
A) nuclei
B) nerves
C) ganglia
D) tracts
C

The term central nervous system refers to the ________.
A) autonomic nervous system
B) brain, spinal cord, and peripheral nerves
C) brain and spinal cord
D) spinal cord and spinal nerves
C

The substance released at axon terminals to propagate a nervous impulse is called a(n)
________.
A) ion
B) cholinesterase
C) neurotransmitter
D) biogenic amine
C

A neuron that has as its primary function the job of connecting other neurons is called a(n)
________.
A) efferent neuron
B) afferent neuron
C) association neuron
D) glial cell
C

Saltatory conduction is made possible by ________.
A) the myelin sheath
B) large nerve fibers
C) diphasic impulses
D) erratic transmission of nerve impulses
A

The part of the neuron that normally receives stimuli is called ________.
A) an axon
B) a dendrite
C) a neurolemma
D) a Schwann cell
B

The sympathetic and parasympathetic are subdivisions of the ________.
A) central nervous system
B) voluntary nervous system
C) autonomic nervous system
D) somatic nervous system
C

Ependymal cells ________.
A) are a type of neuron
B) are a type of macrophage
C) are the most numerous of the neuroglia
D) help to circulate the cerebrospinal fluid
D

Neuroglia that control the chemical environment around neurons by buffering potassium and
recapturing neurotransmitters are ________.
A) astrocytes
B) oligodendrocytes
C) microglia
D) Schwann cells
A

Schwann cells are functionally similar to ________.
A) ependymal cells
B) microglia
C) oligodendrocytes
D) astrocytes
C

Immediately after an action potential has peaked, which cellular gates open?
A) sodium
B) chloride
C) calcium
D) potassium
D

An inhibitory postsynaptic potential (IPSP) is associated with ________.

A) a change in sodium ion permeability

B) hyperpolarization

C) opening of voltage-regulated channels

D) lowering the threshold for an action potential to occur
B

Which of the following will occur when an excitatory postsynaptic potential (EPSP) is being
generated on the dendritic membrane?

A) Specific sodium gates will open.

B) Specific potassium gates will open.

C) Sodium gates will open first, then close as potassium gates open.

D) A single type of channel will open, permitting simultaneous flow of sodium and
potassium.
D

When a sensory neuron is excited by some form of energy, the resulting graded potential is
called a(n) ________.
A) postsynaptic potential
B) excitatory potential
C) action potential
D) generator potential
D

________ is an indolamine.
A) Dopamine
B) Epinephrine
C) Serotonin
D) Tyrosine
C