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A&P Test 3 > test questions > Flashcards

test questions Flashcards

1
Q

In what way does the interior surface of a cell membrane of a resting (nonconducting) neuron differ from the external environment? The interior is

A

Negatively charged and contains less sodium

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2
Q

Which of the following is not characteristic of neurons?

A

They are mitotic.

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3
Q

An impulse from one nerve cell is communicated to another nerve cell via the ________.

A

Synapse

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4
Q

What does the central nervous system use to determine the strength of a stimulus?

A

Frequency of action potentials

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5
Q

The autonomic nervous system is under voluntary control; whereas, the somatic nervous system is involuntary.

A

False

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6
Q

What are ciliated CNS neuroglia that play an active role in moving the cerebrospinal fluid called?

A

Ependymal cells

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7
Q

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

A

Voltage-gated channel

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8
Q

Myelination of the nerve fibers in the central nervous system is the job of the oligodendrocyte.

A

True

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9
Q

Axon diameter and degree of myelination determine nerve impulse conduction velocity.

A

True

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10
Q

The period after an initial stimulus when a neuron is not sensitive to another stimulus is the ________.

A

Absolute refractory period

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11
Q

Strong stimuli cause the amplitude of action potentials generated to increase.

A

False

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12
Q

Immediately after an action potential has peaked, which cellular gates open?

A

Potassium

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13
Q

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

A

True

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14
Q

Large-diameter nerve fibers conduct impulses much faster than small-diameter fibers.

A

True

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15
Q

Which of the following is not a function of astrocytes?

A

Provide the defense for the CNS

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16
Q

The term central nervous system refers to the

A

Brain and spinal cord

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17
Q

The substance released at axon terminals to propagate a nervous impulse is called a(n) ________.

A

Neurotransmitter

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18
Q

A postsynaptic potential is a graded potential that is the result of a neurotransmitter released into the synapse between two neurons.

A

True

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19
Q

A stimulus traveling toward a synapse appears to open calcium ion channels at the presynaptic end, which in turn promotes fusion of synaptic vesicles to the axonal membrane.

A

True

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20
Q

Efferent nerve fibers may be described as motor nerve fibers.

A

True

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21
Q

Projection fibers in the brain mainly connect the right and left hemispheres.

A

False

22
Q

The vital centers for the control of heart rate, respiration, and blood pressure are located in the ________.

A

Medulla

23
Q

Ridges of tissue on the surface of the cerebral hemispheres are called ________.

A

Gyri

24
Q

The central sulcus separates which lobes?

A

Frontal from parietal

25
Q

Meningitis is the most accurate term for inflammation of neurons

A

False

26
Q

The brain area that regulates activities that control the state of wakefulness or alertness of the cerebral cortex is the ________.

A

Reticular formation

27
Q

Nuclei relating to the startle reflex are located in the corpora quadrigemina of the midbrain.

A

True

28
Q

The limbic system acts as our emotional, or affective, brain.

A

True

29
Q

Which fissure separates the cerebral hemispheres?

A

Longitudinal fissure

30
Q

Sorting of sensory information and relaying it to the appropriate cerebral sensory area occurs in the hypothalamus.

A

False

31
Q

The subarachnoid space lies between what two layers of meninges?

A

Arachnoid and pia

32
Q

Which of the following is not a function of the CSF?

A

Initiation of some nerve impulses

33
Q

The brain stem consists of the ________.

A

Midbrain, medulla, and pons

34
Q

The three basic regions of the cerebrum are the cerebral cortical gray matter, internal white matter, and the superior and inferior colliculi.

A

False

35
Q

A disturbance of posture, muscle tremors at rest, and uncontrolled muscle contraction are all symptoms of damage to the basal nuclei.

A

True

36
Q

Loss of ability to perform skilled motor activities such as piano playing, with no paralysis or weakness in specific muscles, might suggest damage to the ________.

A

Premotor cortex

37
Q

The arbor vitae refers to ________.

A

Cerebellar white matter

38
Q

Commissural fibers connect the cerebrum to the diencephalon.

A

False

39
Q

What cells line the ventricles of the brain?

A

Ependymal cells

40
Q

The frontal lobe is separated from the temporal lobe by the ________.

A

Lateral sulcus

41
Q

One functional center found within the medulla oblongata is a respiratory center involved in the control of the rate and depth of breathing.

A

True

42
Q

Which of the following is not a function of the autonomic nervous system?

A

Innervation of skeletal muscle

43
Q

During depolarization, the inside of the neuron’s membrane becomes less negative.

A

True

44
Q

Saltatory conduction is made possible by ________.

A

The myelin sheath

45
Q

In myelinated axons the voltage-regulated sodium channels are concentrated at the nodes of Ranvier.

A

True

46
Q

A shallow groove on the surface of the cortex is called a ________.

A

Sulcus

47
Q

Collections of nerve cell bodies outside the central nervous system are called ________.

A

Ganglia

48
Q

Broca’s area ________.

A

Is considered a motor speech area

49
Q

Schwann cells are functionally similar to ________.

A

Oligodendrocytes

50
Q

The primary auditory cortex is located in the ________.

A

Temporal lobe

51
Q

The action potential is caused by permeability changes in the plasma membrane.

A

True

A&P Test 3 (1 decks)

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