Rio Salado Bio 201 Exam 3| Brand
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Myelination of the nerve fibers in the central nervous system is the job of the
oligodendrocyte.
T/F - Answer✅✅True
If bacteria invaded the CNS tissue, microglia would migrate to the area to engulf and
destroy them. T/F - Answer✅✅True
Neurons in the CNS are organized into functional groups. T/F - Answer✅✅True
Efferent nerve fibers may be described as motor nerve fibers. T/F - Answer✅✅True
Voltage is always measured between two points and may be called the potential
between these two points. T/F - Answer✅✅True
The all-or-none phenomenon as applied to nerve conduction states that the whole
nerve cell must be stimulated for conduction to take place. T/F - Answer✅✅False.
The all-or-none phenomenon states that the action potential either happens
completely or it doesn't happen at all.
,Enkephalins and endorphins are peptides that act like morphine. T/F -
Answer✅✅True
Action potentials can be generated by virtually all cells of the body because all cells
possess cell membranes. T/F - Answer✅✅False. Only cells with excitable
membranes, such as neurons and muscle cells, can generate action potentials.
Acetylcholine is not a biogenic amine. T/F - Answer✅✅True
In myelinated axons the voltage-gated sodium channels are concentrated at the
nodes of Ranvier. T/F - Answer✅✅True
During depolarization, the inside of the neuron's membrane becomes less negative.
T or F - Answer✅✅True
A graded potential that is the result of a neurotransmitter released into the synapse
between two neurons is called a postsynaptic potential. T or F - Answer✅✅True
Strong stimuli cause the amplitude of action potentials generated to increase. T or F
- Answer✅✅False. As stated in the all-or-none phenomenon, an action potential
occurs either completely or it doesn't happen.
A synapse formed between the axonal ending of one neuron and the cell body of
another neuron is called an axosomatic synapse. T or F - Answer✅✅True
The two major classes of graded potentials are transmitter potentials and receptor
potentials. T or F - Answer✅✅False. The two classes of graded potentials are
generator potentials and post-synaptic potentials
A stimulus traveling toward a synapse appears to open calcium channels at the
presynaptic end, which in turn promotes fusion of synaptic vesicles to the axonal
membrane. T or F - Answer✅✅True
Sensory neurons have long dendrites, while motor neurons have long axons. T or F -
Answer✅✅True
Large-diameter nerve fibers conduct impulses much faster than small-diameter
fibers. T/F - Answer✅✅True
Saltatory conduction occurs because of the presence of salt (NaCl) around the
neuron. T or F - Answer✅✅False. Saltatory conduction refers to the signal jumping
from node to node along the axon.
The nodes of Ranvier are found only on myelinated, peripheral neural processes. T
or F - Answer✅✅True
, A positive feedback cycle is the main force in the generation of graded potentials at
receptor ends. T or F - Answer✅✅False. Positive feedback occurs after
depolarization begins.
Cell bodies of sensory neurons are located in ganglia lying outside the central
nervous system. T or F - Answer✅✅True
The oligodendrocytes can myelinate several axons. T or F - Answer✅✅True
What component of the neuron conducts impulses toward the nerve cell body? -
Answer✅✅Dendrites
Where are neurotransmitters released from? - Answer✅✅Axon Terminal
What component of the neuron conducts impulses away from the cell body? -
Answer✅✅Axon
What component of the neuron consists of the rough ER? - Answer✅✅Nissl bodies
The interior of the cell becomes less negative due to an influx of sodium ions. -
Answer✅✅Depolarization
The specific period during which potassium ions diffuse out of the neuron due to a
change in membrane permeability. - Answer✅✅Repolarization
Period during which the neuron cannot respond to a second stimulus, no matter
how strong. - Answer✅✅Absolute refractory period
An exceptionally strong stimulus can trigger a response. - Answer✅✅Relative
refractory period
Called a nerve impulse when transmitted - Answer✅✅action potential
Circuits category: Smells are processed by serial pathways. T or F - Answer✅✅False
Neurophysiology category: Some ions are prevented from moving down their
concentration gradients by ATP-driven pumps. T or F - Answer✅✅True
Potentials category: graded potentials are short-lived. T or F - Answer✅✅True
Circuits category: Which neuronal circuit concentrates or directs a large number of
incoming impulses to a rather small number of neurons?
A. Converging
B. Diverging - Answer✅✅Converging
CNS, PNS, ANS category: Innervation of skeletal muscle is a function of the
autonomic nervous system. T or F - Answer✅✅False
, Neurophysiology category: The sodium-potassium pump pumps three sodium ions
outside the cell and two potassium ions inside. T or F - Answer✅✅True
Potentials category: An action potential involves impulse propagation dependent on
chemically gated ion channels. T or F - Answer✅✅False
Neurophysiology category: Voltage is measured by placing one electrode inside the
membrane and another outside the membrane. T or F - Answer✅✅True
Neurons category: Which neuron's primary function is to connect other neurons?
Connective or Association - Answer✅✅Association
CNS, PNS, ANS category: Neuroglia that control the chemical environment around
neurons by buffering potassium and recapturing neurotransmitters are astrocytes. T
or F - Answer✅✅True
Potentials category: An action potential is essential for impulse propagation. -
Answer✅✅True
Neurons category: What is the part of a neuron that conducts impulses away from
its cell body?
Axon or Dendrite - Answer✅✅Axon
Potentials category: Which of the following is actively transported through the cell
membrane to establish a resting potential?
Na
Mg
Cl
Ca - Answer✅✅Na
CNS, PNS, ANS category: Ependymal cells help to circulate the cerebrospinal fluid. T
or F - Answer✅✅True
The Synapse category: An inhibitory postsynaptic potential (IPSP) is associated with
hyperpolarization. T or F - Answer✅✅True
Circuits category: Spinal reflexes are an example of serial processing. T or F -
Answer✅✅True
Neurophysiology category: Ions always move actively across membranes through
leakage channels. T or F - Answer✅✅False
Neurotransmitters category: Direct-acting neurotransmitters open ion channels to
provoke which responses?
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New Expert Exam Guide with 100%
Correct Clear Verified Answers| All
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Success| Latest Premium Update.
Myelination of the nerve fibers in the central nervous system is the job of the
oligodendrocyte.
T/F - Answer✅✅True
If bacteria invaded the CNS tissue, microglia would migrate to the area to engulf and
destroy them. T/F - Answer✅✅True
Neurons in the CNS are organized into functional groups. T/F - Answer✅✅True
Efferent nerve fibers may be described as motor nerve fibers. T/F - Answer✅✅True
Voltage is always measured between two points and may be called the potential
between these two points. T/F - Answer✅✅True
The all-or-none phenomenon as applied to nerve conduction states that the whole
nerve cell must be stimulated for conduction to take place. T/F - Answer✅✅False.
The all-or-none phenomenon states that the action potential either happens
completely or it doesn't happen at all.
,Enkephalins and endorphins are peptides that act like morphine. T/F -
Answer✅✅True
Action potentials can be generated by virtually all cells of the body because all cells
possess cell membranes. T/F - Answer✅✅False. Only cells with excitable
membranes, such as neurons and muscle cells, can generate action potentials.
Acetylcholine is not a biogenic amine. T/F - Answer✅✅True
In myelinated axons the voltage-gated sodium channels are concentrated at the
nodes of Ranvier. T/F - Answer✅✅True
During depolarization, the inside of the neuron's membrane becomes less negative.
T or F - Answer✅✅True
A graded potential that is the result of a neurotransmitter released into the synapse
between two neurons is called a postsynaptic potential. T or F - Answer✅✅True
Strong stimuli cause the amplitude of action potentials generated to increase. T or F
- Answer✅✅False. As stated in the all-or-none phenomenon, an action potential
occurs either completely or it doesn't happen.
A synapse formed between the axonal ending of one neuron and the cell body of
another neuron is called an axosomatic synapse. T or F - Answer✅✅True
The two major classes of graded potentials are transmitter potentials and receptor
potentials. T or F - Answer✅✅False. The two classes of graded potentials are
generator potentials and post-synaptic potentials
A stimulus traveling toward a synapse appears to open calcium channels at the
presynaptic end, which in turn promotes fusion of synaptic vesicles to the axonal
membrane. T or F - Answer✅✅True
Sensory neurons have long dendrites, while motor neurons have long axons. T or F -
Answer✅✅True
Large-diameter nerve fibers conduct impulses much faster than small-diameter
fibers. T/F - Answer✅✅True
Saltatory conduction occurs because of the presence of salt (NaCl) around the
neuron. T or F - Answer✅✅False. Saltatory conduction refers to the signal jumping
from node to node along the axon.
The nodes of Ranvier are found only on myelinated, peripheral neural processes. T
or F - Answer✅✅True
, A positive feedback cycle is the main force in the generation of graded potentials at
receptor ends. T or F - Answer✅✅False. Positive feedback occurs after
depolarization begins.
Cell bodies of sensory neurons are located in ganglia lying outside the central
nervous system. T or F - Answer✅✅True
The oligodendrocytes can myelinate several axons. T or F - Answer✅✅True
What component of the neuron conducts impulses toward the nerve cell body? -
Answer✅✅Dendrites
Where are neurotransmitters released from? - Answer✅✅Axon Terminal
What component of the neuron conducts impulses away from the cell body? -
Answer✅✅Axon
What component of the neuron consists of the rough ER? - Answer✅✅Nissl bodies
The interior of the cell becomes less negative due to an influx of sodium ions. -
Answer✅✅Depolarization
The specific period during which potassium ions diffuse out of the neuron due to a
change in membrane permeability. - Answer✅✅Repolarization
Period during which the neuron cannot respond to a second stimulus, no matter
how strong. - Answer✅✅Absolute refractory period
An exceptionally strong stimulus can trigger a response. - Answer✅✅Relative
refractory period
Called a nerve impulse when transmitted - Answer✅✅action potential
Circuits category: Smells are processed by serial pathways. T or F - Answer✅✅False
Neurophysiology category: Some ions are prevented from moving down their
concentration gradients by ATP-driven pumps. T or F - Answer✅✅True
Potentials category: graded potentials are short-lived. T or F - Answer✅✅True
Circuits category: Which neuronal circuit concentrates or directs a large number of
incoming impulses to a rather small number of neurons?
A. Converging
B. Diverging - Answer✅✅Converging
CNS, PNS, ANS category: Innervation of skeletal muscle is a function of the
autonomic nervous system. T or F - Answer✅✅False
, Neurophysiology category: The sodium-potassium pump pumps three sodium ions
outside the cell and two potassium ions inside. T or F - Answer✅✅True
Potentials category: An action potential involves impulse propagation dependent on
chemically gated ion channels. T or F - Answer✅✅False
Neurophysiology category: Voltage is measured by placing one electrode inside the
membrane and another outside the membrane. T or F - Answer✅✅True
Neurons category: Which neuron's primary function is to connect other neurons?
Connective or Association - Answer✅✅Association
CNS, PNS, ANS category: Neuroglia that control the chemical environment around
neurons by buffering potassium and recapturing neurotransmitters are astrocytes. T
or F - Answer✅✅True
Potentials category: An action potential is essential for impulse propagation. -
Answer✅✅True
Neurons category: What is the part of a neuron that conducts impulses away from
its cell body?
Axon or Dendrite - Answer✅✅Axon
Potentials category: Which of the following is actively transported through the cell
membrane to establish a resting potential?
Na
Mg
Cl
Ca - Answer✅✅Na
CNS, PNS, ANS category: Ependymal cells help to circulate the cerebrospinal fluid. T
or F - Answer✅✅True
The Synapse category: An inhibitory postsynaptic potential (IPSP) is associated with
hyperpolarization. T or F - Answer✅✅True
Circuits category: Spinal reflexes are an example of serial processing. T or F -
Answer✅✅True
Neurophysiology category: Ions always move actively across membranes through
leakage channels. T or F - Answer✅✅False
Neurotransmitters category: Direct-acting neurotransmitters open ion channels to
provoke which responses?
Rapid
Fast and quick
