Chapter 11-2401

The nervous system has three overlapping functions. Which of the following represents a logical sequence of these three functions?

• a)Sensory input, motor output, integration

• b)Motor output, integration, sensory input

• c)Sensory input, integration, motor output

• d)Integration, sensory input, motor output

While studying for an exam, you reach for a beverage. To extend your arm, your __________ nervous system is activated.

• Somatic

• Afferent

• autonomic

• sympathetic

The door slams shut loudly and you flinch. After a few seconds, you realize that your heart is beating very rapidly and forcefully. This response is the result of your __________ nervous system.

• Autonomic

• afferent

• central

• somatic

Complete the following analogy: Electrical wire is to electrical insulating tape as peripheral neurons (PNS) are to __________.

• Schwann cells

• Oligodendrocytes

• astrocytes

• ependymal cells

Myelin sheaths in the CNS are produced by the ________.

• Schwann cells

• Oligodendrocytes

• astrocytes

• ependymal cells

The basis for differentiation between gray matter and white matter in the CNS is the presence of __________ in white matter

• unmyelinated fibers

• myelinated fibers

• Schwann cells

• ependymal cells

__________ are the most common structural type of neuron in humans

• unipolar

• bipolar

• multipolar

The portion of an axon that communicates with its target cell is the __________.

• Dendrite

• Axon

• Axon Terminal

• Cell body

Afferent pathways -will take information ______________ the central nervous system. 

 

• to

• away from

A change in membrane potential from –70mV to

–40mV is termed ________. (This is caused due to influx of Na+ ions)

• repolarization

• depolarization

• hyperpolarization