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Nervous System Online Quiz part 1

front 1

What is the functional classification for voluntary nerves?

back 1

  • somatic motor

front 2

To which structural class of the nervous system do autonomic nerves belong?

back 2

peripheral nervous system

front 3

Which term refers to the conscious control of skeletal muscles?

back 3

  • somatic nervous system

front 4

What cells of the nervous system are responsible for anchoring neurons to their blood vessels and controlling the extra cellular fluid concentrations of potassium and neurotransmitters?

back 4

Astrocytes

front 5

What is the first event of an action potential?

back 5

  • Sodium ions diffuse rapidly and the membrane depolarizes.

front 6

Which of these lists the components of a reflex arc in the correct sequence?

back 6

  • receptor; afferent neuron; control center; efferent neuron; effector

front 7

The term central nervous system refers to the:

back 7

  • brain and spinal cord

front 8

Fibers that carry information from the skin, joints, and skeletal muscles to the central nervous system are:

back 8

  • somatic sensory

front 9

Which of these neuroglia cells forms the myelin sheath in the central nervous system:

back 9

  • Oligodendrocytes

front 10

The Schwann cell forms a myelin sheath around the:

back 10

  • Axon

front 11

The neuron processes that normally receive incoming stimuli are called:

back 11

  • Dendrites

front 12

Collections of nerve cell bodies outside the CNS are called:

back 12

  • Ganglia

front 13

The major role of the inter neuron is to:

back 13

  • connect motor and sensory neurons in their pathways

front 14

The two major functional properties of neurons are:

back 14

  • irritability and conductivity

front 15

White matters refers to myelinated fibers in the:

back 15

  • CNS

front 16

Impulse conduction is fastest in neurons that are:

back 16

  • Myelinated

front 17

During the resting state, a neuron is:

back 17

  • polarized with sodium ions outside the cell and potassium ions inside the cell

front 18

Immediately after an action potential is propagated, which one of the following ions rapidly diffuses out of the cell into the tissue fluid:

back 18

  • potassium

front 19

An action potential is caused by an influx of these ions into the cell:

back 19

  • sodium

front 20

Nerve impulse transmissions occurring along myelinated neurons are called:

back 20

sodium-potassium pump

front 21

The diffusion of potassium ions out of a neuron causes it to experience:

back 21

  • repolarization

front 22

Which one of the following is the correct sequence of events that correlates to the sequence of events of a nerve impulse:

  1. the membrane becomes depolarized
  2. sodium channels open and sodium ions diffuse inward
  3. the membrane becomes repolarized
  4. potassium channels open and potassium ions diffuse outward while sodium is actively transported out of the cell

back 22

  • 2, 1, 4, 3

front 23

The gap between two communicating neurons is termed:

back 23

  • synaptic cleft

front 24

The substance that is released at axonal endings to propagate a nervous impulse is called:

back 24

  • neurotransmitter

front 25

Which of the following is the correct sequence in a typical reflex arc:

back 25

receptor, afferent neuron, integration center, efferent neuron, effector

front 26

Muscles and glands are:

back 26

  • effectors

front 27

Which type of reflex involves skeletal muscles:

back 27

  • somatic

front 28

The elevated ridges of tissue on the surface of the cerebral hemispheres are known as __________ while the shallow grooves are termed __________.

back 28

  • gyri; sulci

front 29

A stroke in the primary motor area has caused Don to lose control over his skeletal muscles on the right side of his body. What lobe of his brain was damaged:

back 29

  • frontal lobe

front 30

Sally has a brain injury; she knows what she wants to say but can't vocalize the words. The part of her brain that deals with the ability to speak is the:

back 30

  • Broca's area