A&P Chapter 11

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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

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