Which of the following is NOT one of the basic functions of the nervous system? |
Neural genesis |
Which of the following allows us to consciously control our skeletal muscles? |
The somatic nervous system |
What part of the nervous system performs information processing and integration? |
Central nervous system |
Which of the following types of neurons carries impulses away from the CNS? |
Motor |
Which of the following types of glial cells monitor the health of neurons, and can transform into a special type of macrophage to protect endangered neurons? |
Microglia |
Which of the following types of glial cells produce the myelin sheaths that insulate the neural fibers in the CNS? |
Oligodendrocytes |
Which of the following PNS neuroglia help to form myelin sheaths around larger nerve fibers in the PNS? |
Schwann cells |
Which of the following are bundles of neurofilaments important in maintaining the shape and integrity of neurons? |
Neurofibrils |
Which of the following is true of axons? |
Each neuron has a single axon |
Which of the following is the conducting region of the neuron? |
Axon |
Which of the following are gaps found along a myelin sheath? |
Nodes of Ranvier |
which criteria is used to functionally classify neurons? |
The direction in which the nerve impulse travels relative to the central nervous system |
Which of the following is NOT a functional classification of neurons? |
Extraneurons |
Which of the following is NOT true of association neurons? |
Most association neurons are confined within the PNS |
Which of the following does not factor into the rate of impulse propagation? |
The number of axon collaterals extending from a truncated axon |
Which of the following is NOT true of an electrical synapse? |
They are specialized for release and reception of chemical neurotransmitters |
Which neuroglia are the most abundant and versatile of the glial cells? |
Astrocytes |
Which part of the neuron is responsible for generating a nerve impulse? |
Axon |
Which of the following is NOT one of the chemical classes into which neurotransmitters fall? |
Chlorides |
What does the difference in the K+ and Na+ concentration on either side of the plasma membrane generate? |
Resting membrane potential |
Which of the following is NOT a type of circuit? |
Pre-discharge circuits |
What type of stimulus is required for an action potential to be generated? |
A threshold level stimulus |
Which of the following circuit types is involved in the control of rhythmic activities such as the sleep-wake cycle, breathing, and certain motor activities (such as arm swinging when walking)? |
Reverberating circuits |
Which membrane potential results in depolarization without a nerve impulse being generated? |
Excitatory postsynaptic potential |
Which pattern or neural processing works in a predictable, all-or-nothing manner, where reflexes are rapid, automatic responses to stimuli in which a particular stimulus always causes the same response? |
Serial processing |
Which neurotransmitter(s) is/are the body’s natural pain killer? |
endorphins |
Neurons and nerve cells are different names for the same thing |
True |
Unmyelinated fibers conduct impulses faster than myelinated fibers |
False |
The sodium-potassium pump ejects two Na from the cell and then transports three K back into the cell in order to stabilize the resting membrane potential |
False |
Which neuron circuit pattern is involved in the control of rhythmic activities such as breathing? |
Reverberating circuit |
What component of the reflex arc determines the response to a stimulus? |
Integration center |
Sequence of events at synapse: |
Action potential arrives at the synaptic terminal, calcium channels open, and calcium ions enter the synaptic terminal, vesicles containing neurotransmitter fuse with the plasma membrane of the sending neuron, neurotransmitter molecules diffuse across the synaptic cleft, and the neurotransmitter molecules bind to receptors in the plasma membrane of the receiving neuron, causing ion channels there to open. |
Which of the following types of glial cells monitors the health of neurons, and can transform into a special type of macrophage to protect endangered neurons? |
Microglia |
Which of the following types of glial cells produces the myelin sheaths that insulate axons, or nerve fibers, in the CNS? |
Oligodendrocytes |
Which of the following PNS neuroglia form the myelin sheaths around larger nerve fibers in the PNS? |
Schwann cells |
Which of the following are bundles of neurofilaments that are important in maintaining the shape and integrity of neurons? |
Neurofibrils |
Which criterion is used to functionally classify neurons? |
The direction in which the nerve impulse travels relative to the central nervous system |
A&P Chapter 11
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