Mastering Myelin and Grey/White Matter

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Questions and Answers

Which division of the peripheral nervous system transmits impulses towards the CNS?

  • Schwann cell division
  • Sensory (afferent) division (correct)
  • Motor (efferent) division
  • Support cell division

What is the function of the autonomic nervous system (ANS)?

  • To control involuntary movements of smooth and cardiac muscles (correct)
  • To control the spinal cord
  • To control the skeletal muscles
  • To control voluntary movements

Where is the cell body of a somatic efferent neuron located?

  • In a ganglion
  • In the spinal cord
  • In the brain
  • In the gray matter of the CNS (correct)

Which division of the peripheral nervous system transmits sensory impulses towards the CNS?

<p>Somatic afferent division (A)</p> Signup and view all the answers

How many cervical nerves are there in the spinal nerves?

<p>8 (C)</p> Signup and view all the answers

What is the function of the phrenic nerve?

<p>To transmit sensory impulses to the CNS (B)</p> Signup and view all the answers

Which division of the nervous system is responsible for the fight or flight response?

<p>Sympathetic Nervous System (C)</p> Signup and view all the answers

Which division of the autonomic nervous system is responsible for rest and digest activities?

<p>Parasympathetic Nervous System (C)</p> Signup and view all the answers

Where are the nerve cell bodies of postganglionic sympathetic neurons located?

<p>In the thoracolumbar region of the spinal cord (C)</p> Signup and view all the answers

What type of muscles does the autonomic nervous system innervate?

<p>Smooth muscles and cardiac muscles (C)</p> Signup and view all the answers

How many neurons are there in the autonomic nervous system?

<p>2 neurons (B)</p> Signup and view all the answers

What is the main function of the somatic efferent division of the nervous system?

<p>To coordinate voluntary movements of skeletal muscles (D)</p> Signup and view all the answers

Which of the following is true about myelin?

<p>It increases conduction speed (C)</p> Signup and view all the answers

Which of the following is true about grey matter?

<p>It is nervous tissue without myelin (B)</p> Signup and view all the answers

Which of the following is true about white matter?

<p>It includes nerve cell bodies and myelinated nerve fibers (D)</p> Signup and view all the answers

Which of the following is true about the autonomic nervous system?

<p>It is responsible for the fight or flight response (D)</p> Signup and view all the answers

Which of the following is true about the somatic efferent division?

<p>It is responsible for involuntary control of body functions (B)</p> Signup and view all the answers

Which of the following is true about the sensory subdivision of the peripheral nervous system?

<p>It contains cell bodies in the gray matter of the central nervous system (C)</p> Signup and view all the answers

Which of the following accurately describes the components of the Peripheral Nervous System (PNS)?

<p>The PNS includes nerves, cell types, their morphology, ganglia, and their function. (B)</p> Signup and view all the answers

What are the parts of a spinal nerve?

<p>Cell bodies, axons, and dendrites. (B)</p> Signup and view all the answers

What is the purpose of a nerve plexus?

<p>To combine and distribute nerve fibers from multiple spinal nerves. (A)</p> Signup and view all the answers

What is the difference between sensory and motor functions in the nervous system?

<p>Sensory functions are involuntary, while motor functions are voluntary. (C)</p> Signup and view all the answers

What is myelin and what cells produce it?

<p>Myelin is a fatty substance and is produced by oligodendrocytes and Schwann cells. (D)</p> Signup and view all the answers

What is the difference between white and grey matter?

<p>White matter contains axons, while grey matter contains cell bodies. (B)</p> Signup and view all the answers

Which part of the nervous system is responsible for the involuntary control of smooth and cardiac muscles, as well as glands?

<p>Sympathetic Nervous System (SNS) (D)</p> Signup and view all the answers

Which part of the nervous system is responsible for voluntary control of striated/skeletal muscles?

<p>Somatic Efferent Nervous System (D)</p> Signup and view all the answers

Where are the nerve cell bodies of the parasympathetic post-ganglionic neurons located?

<p>In the terminal ganglia on the structures innervated (B)</p> Signup and view all the answers

Which part of the nervous system is responsible for the 'rest and digest' response?

<p>Parasympathetic Nervous System (PsNS) (A)</p> Signup and view all the answers

Which part of the nervous system is responsible for the 'fight or flight' response?

<p>Sympathetic Nervous System (SNS) (B)</p> Signup and view all the answers

What is the function of the vagus nerves in the autonomic control of the heart?

<p>Slow down the heart (C)</p> Signup and view all the answers

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