Ch 13 Introduction to the Nervous System; HW Principles of Anatomy

Which of the following statements about oligodendrocytes and/or Schwann cells is correct?

Schwann cells provide a framework for growth when an axon has been cut and is in the process of regenerating.

Which of the following occurs in the afferent division of the peripheral nervous system?

A neuron carries information from the stomach area to the brain.

Which type of neuron is found in the CNS and special sense organs and has NO distinguishable axon?

anaxonic neurons

The gaps between areas of myelin ________________

are called nodes

If Rachel takes a medication that is designed to regulate her heart rate but should NOT affect her nervous system, what cells keep the chemical in the medication from penetrating the brain tissue?

astrocytes

Which of the following is an activity of the nervous system?

detection of pain after a bee sting

Axons covered in myelin have ___________________________-

faster action potential speeds than those without myelin.

The structural classification of a neuron is based upon ________.

the number of processes that project from the cell body

The functional classifications of neurons include ________, which carry information toward the CNS.

sensory neurons

Involuntary cardiac muscle fibers of the heart are innervated by ________.

visceral motor fibers

Schwann cells can myelinate only one segment of one axon, ___________________________________

whereas oligodendrocytes can contribute myelin to many axons.

Which number represents the neuroglia that are most abundant?

4 (Astrocytes)

Which of the following statements accurately compare(s) neuroglia to neurons?

Neuroglia have a greater ability to phagocytize foreign particles; Neuroglia have a greater ability to block the movement of materials out of the blood vessels; Neuroglia act more as structural components of the CNS.

In what way are neurons different from neuroglia?

Neurons are excitable and conductive, whereas neuroglia are not.

Which of the following is FALSE regarding the myelin sheaths of neurons?

Only large-diameter axons in the PNS are covered in myelin. Small-diameter axons are short and require no myelin.

It is possible for an axon to synapse with ________________

a glandular cell; a muscle cell, such as skeletal muscle; another neuron

If Julie is in a store deciding whether or not to buy a new purse, her decision-making thought process requires activity from which part of the nervous system?

central nervous system