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?

Sensory (afferent) division

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

To control involuntary movements of smooth and cardiac muscles

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

In the gray matter of the CNS

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

Somatic afferent division Signup and view all the answers

How many cervical nerves are there in the spinal nerves?

8 Signup and view all the answers

What is the function of the phrenic nerve?

To transmit sensory impulses to the CNS Signup and view all the answers

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

Sympathetic Nervous System Signup and view all the answers

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

Parasympathetic Nervous System Signup and view all the answers

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

In the thoracolumbar region of the spinal cord Signup and view all the answers

What type of muscles does the autonomic nervous system innervate?

Smooth muscles and cardiac muscles Signup and view all the answers

How many neurons are there in the autonomic nervous system?

2 neurons Signup and view all the answers

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

To coordinate voluntary movements of skeletal muscles Signup and view all the answers

Which of the following is true about myelin?

It increases conduction speed Signup and view all the answers

Which of the following is true about grey matter?

It is nervous tissue without myelin Signup and view all the answers

Which of the following is true about white matter?

It includes nerve cell bodies and myelinated nerve fibers Signup and view all the answers

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

It is responsible for the fight or flight response Signup and view all the answers

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

It is responsible for involuntary control of body functions Signup and view all the answers

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

It contains cell bodies in the gray matter of the central nervous system Signup and view all the answers

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

The PNS includes nerves, cell types, their morphology, ganglia, and their function. Signup and view all the answers

What are the parts of a spinal nerve?

Cell bodies, axons, and dendrites. Signup and view all the answers

What is the purpose of a nerve plexus?

To combine and distribute nerve fibers from multiple spinal nerves. Signup and view all the answers

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

Sensory functions are involuntary, while motor functions are voluntary. Signup and view all the answers

What is myelin and what cells produce it?

Myelin is a fatty substance and is produced by oligodendrocytes and Schwann cells. Signup and view all the answers

What is the difference between white and grey matter?

White matter contains axons, while grey matter contains cell bodies. 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?

Sympathetic Nervous System (SNS) Signup and view all the answers

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

Somatic Efferent Nervous System Signup and view all the answers

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

In the terminal ganglia on the structures innervated Signup and view all the answers

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

Parasympathetic Nervous System (PsNS) Signup and view all the answers

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