Autonomic Nervous System Kehl
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Questions and Answers

What is the main function of the motor (efferent) division of the nervous system?

  • To transmit impulses from the brain to the muscles and glands (correct)
  • To transmit impulses from the sensory organs to the brain
  • To transmit impulses from the brain to the sensory organs
  • To transmit impulses from the muscles and glands to the brain

    • What are the three main branches that a spinal nerve divides into shortly after exiting the intervertebral foramen?

  • Sensory ramus, motor ramus, and communicating ramus
  • Dorsal ramus, ventral ramus, and communicating ramus (correct)
  • Afferent ramus, efferent ramus, and connecting ramus
  • Anterior ramus, posterior ramus, and connecting ramus

    • What type of information is carried by the dorsal ramus of a spinal nerve?

  • Neither sensory nor motor information
  • Only motor information
  • Both sensory and motor information (correct)
  • Only sensory information

    • What is the function of a nerve plexus?

    <p>To ensure that all parts of the body are innervated</p> Signup and view all the answers

    What are the root values of the phrenic nerve?

    <p>C5, C6, C7</p> Signup and view all the answers

    What is the difference between the somatic and autonomic subdivisions of the motor nervous system?

    <p>Both a and b</p> Signup and view all the answers

    What is the main function of the Autonomic Nervous System (ANS)?

    <p>To control involuntary bodily functions</p> Signup and view all the answers

    How many neurons make up the two-neuron system of the Autonomic Nervous System?

    <p>At least two neurons</p> Signup and view all the answers

    Which division of the ANS is responsible for the 'fight-or-flight' response?

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

    Where are the cell bodies of the preganglionic neurons located in the Parasympathetic Nervous System?

    <p>In the brainstem and sacral region of the spinal cord</p> Signup and view all the answers

    Where are the cell bodies of the postganglionic neurons located in the Sympathetic Nervous System?

    <p>In the cervical, thoracic, and abdominal ganglia separate from the target organs</p> Signup and view all the answers

    What is the relationship between the preganglionic and postganglionic neurons in the Sympathetic Nervous System?

    <p>The preganglionic neuron synapses on a postganglionic neuron in a remote ganglion, not necessarily the closest one.</p> Signup and view all the answers

    What is the function of the parasympathetic division of the autonomic nervous system?

    <p>Maintain homeostasis and rest and digest functions</p> Signup and view all the answers

    How many neurons are involved in the autonomic motor circuit?

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

    Which of the following is NOT a part of the peripheral nervous system (PNS)?

    <p>Spinal cord</p> Signup and view all the answers

    Which division of the nervous system controls voluntary movements of skeletal muscles?

    <p>Somatic efferent division</p> Signup and view all the answers

    What is the primary function of the sympathetic division of the autonomic nervous system?

    <p>Prepare the body for fight or flight responses</p> Signup and view all the answers

    Which of the following is NOT a part of the spinal nerves?

    <p>12 cranial nerves</p> Signup and view all the answers

    What is the primary function of the parasympathetic division of the autonomic nervous system?

    <p>To promote rest, digestion, and homeostasis</p> Signup and view all the answers

    What is the difference between the somatic and autonomic subdivisions of the motor nervous system?

    <p>Somatic motor nerves innervate voluntary skeletal muscles, while autonomic motor nerves innervate involuntary smooth and cardiac muscles.</p> Signup and view all the answers

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

    <p>Sympathetic division</p> Signup and view all the answers

    How many neurons are involved in the autonomic motor circuit?

    <p>2</p> Signup and view all the answers

    Where are the cell bodies of the postganglionic neurons located in the Parasympathetic Nervous System?

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

    What is the relationship between the preganglionic and postganglionic neurons in the Sympathetic Nervous System?

    <p>The preganglionic neurons have their cell bodies in the gray matter of the spinal cord, while the postganglionic neurons have their cell bodies in a peripheral ganglion.</p> Signup and view all the answers

    Which division of the Autonomic Nervous System controls the 'fight or flight' response?

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

    What is the function of a nerve plexus?

    <p>To distribute and rearrange nerve fibers, allowing for the innervation of a larger area of the body.</p> Signup and view all the answers

    Where are the nerve cell bodies of post-ganglionic neurons located in the Sympathetic Nervous System?

    <p>In identifiable cervical, thoracic, or abdominal ganglia</p> Signup and view all the answers

    What is the main function of the Parasympathetic Nervous System?

    <p>Rest and digest - homeostasis</p> Signup and view all the answers

    Which region of the spinal cord houses the cell bodies of pre-ganglionic neurons in the Parasympathetic Nervous System?

    <p>Sacral region</p> Signup and view all the answers

    What is characteristic of a preganglionic sympathetic axon synapsing on a postganglionic cell body in the Sympathetic Nervous System?

    <p>Synapses on a cell body in a remote ganglion, not necessarily in the closest one</p> Signup and view all the answers

    Which of the following structures carries both sensory and motor information?

    <p>Ramus communicans</p> Signup and view all the answers

    What is the primary function of a nerve plexus?

    <p>To ensure that all parts of the body are innervated</p> Signup and view all the answers

    Which of the following is NOT a root value of the phrenic nerve?

    <p>C4</p> Signup and view all the answers

    What is the primary function of the somatic subdivision of the motor nervous system?

    <p>To innervate voluntary skeletal muscles</p> Signup and view all the answers

    Which of the following statements about the autonomic nervous system is correct?

    <p>It deals with the automatic control of body functions</p> Signup and view all the answers

    What type of information does the dorsal ramus of a spinal nerve carry?

    <p>Both sensory and motor information to and from the epaxial structures</p> Signup and view all the answers

    What is the primary function of the sympathetic division of the autonomic nervous system?

    <p>To control the 'fight or flight' response</p> Signup and view all the answers

    How many neurons are involved in the autonomic motor circuit?

    <p>Two neurons</p> Signup and view all the answers

    Where are the cell bodies of the postganglionic neurons located in the Parasympathetic Nervous System?

    <p>In ganglia close to or within the target organ</p> Signup and view all the answers

    What is the function of a nerve plexus?

    <p>To distribute and organize the nerves that innervate a region of the body</p> Signup and view all the answers

    Which division of the Autonomic Nervous System controls the 'fight or flight' response?

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

    What is the main function of the Parasympathetic Nervous System?

    <p>To control the 'rest and digest' functions of the body</p> Signup and view all the answers

    Where are the cell bodies of postganglionic neurons located in the Sympathetic Nervous System?

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

    Which division of the Autonomic Nervous System is often referred to as the 'craniosacral system'?

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

    In the Autonomic Nervous System, where does the axon of a preganglionic neuron synapse onto a second autonomic neuron?

    <p>In an autonomic ganglion</p> Signup and view all the answers

    Which part of the spine houses the nerve cell bodies of post-ganglionic neurons in the Parasympathetic Nervous System?

    <p>Sacral region</p> Signup and view all the answers

    What is the primary function of a preganglionic sympathetic axon in the Sympathetic Nervous System?

    <p>To synapse on a postganglionic cell body in a remote ganglion</p> Signup and view all the answers

    Where are the nerve cell bodies of pre-ganglionic neurons located in the Parasympathetic Nervous System?

    <p>In the brainstem and sacral region of the spinal cord</p> Signup and view all the answers

    What is the purpose of a nerve plexus in the nervous system?

    <p>To combine sets of ventral rami of spinal nerves that serve the same area of the body</p> Signup and view all the answers

    Which type of muscle tissue is primarily innervated by the Autonomic Nervous System (ANS)?

    <p>Involuntary tissues such as smooth muscle and cardiac muscle</p> Signup and view all the answers

    What is the primary function of the ventral ramus of a spinal nerve?

    <p>Transporting motor and sensory information to and from the rest of the body</p> Signup and view all the answers

    How many neurons are involved in the efferent output of the Somatic Nervous System?

    <p>One neuron</p> Signup and view all the answers

    Which division of the Autonomic Nervous System is responsible for controlling involuntary bodily functions?

    <p>Visceral division</p> Signup and view all the answers

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