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Exam 11: Fundamentals of the Nervous System and Nervous Tissue

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Question 51

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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

E) A) and B)
F) All of the above

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Question 52

Multiple Choice

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Which ion channel opens in response to a change in membrane potential and participates in the generation and conduction of action potentials?

A) mechanically gated channel
B) voltage-gated channel
C) leakage channel
D) ligand-gated channel

E) B) and C)
F) A) and D)

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Question 53

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If bacteria invaded the CNS tissue, microglia would migrate to the area to engulf and destroy them.

Efferent nerve fibers may be described as motor nerve fibers.

Figure 11.1 Using Figure 11.1, match the following: -Which is by far the most common neuron type?

Figure 11.2 Using Figure 11.2, match the following: -Postsynaptic membrane.

Cell bodies of sensory neurons may be located in ganglia lying outside the central nervous system.

Sally, a 5-year-old child, was bitten on the hand by a bat that was later diagnosed with rabies. She was immediately treated after the bite but had to go through a series of more involved treatments after the rabies diagnosis in the bat that bit her. How does the rabies virus get to the brain from a simple hand wound?

Neuroglia found in the CNS that bind axons and blood vessels to each other are called ________.

Match the following: A) Reverberating circuit B) Diverging circuit C) Converging circuit D) Parallel after-discharge circuit -May be involved in complex, exacting types of mental processing.

The nodes of Ranvier are found only on myelinated, peripheral neuron processes.

Which of the following is an excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle?

Which of the choices below describes the ANS?

Multiple sclerosis (MS) is a disease in which the myelin sheaths are destroyed. What process does this interfere with and what would be the consequence?

Figure 11.1 Using Figure 11.1, match the following: -Which neuron is rare?

Potentials that are short-lived, local changes in membrane potential that can be either depolarized or hyperpolarized are called ________ potentials.

Define synaptic delay.

Saltatory conduction is made possible by ________.

Reflexes are rapid, automatic responses to stimuli.

When one or more presynaptic neurons fire in rapid order it produces a much greater depolarization of the postsynaptic membrane than would result from a single EPSP; this event is called ________ summation.