Sympathetic Innervation of Head Smooth Muscle and Glands Quiz
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Questions and Answers

What type of compounds are odorants?

  • Solid compounds
  • Non-volatile compounds
  • Volatile compounds (correct)
  • Inert compounds
  • Which animal has the olfactory system that has been most carefully studied?

  • Rabbits
  • Birds
  • Cats
  • Dogs (correct)
  • What type of receptors are odorant receptors?

  • Cytokine receptors
  • G-protein coupled receptors (correct)
  • Enzyme-linked receptors
  • Ion channels
  • Where do olfactory neurons send signals to in the brain?

    <p>Frontal cortex and other parts associated with motivation, emotions, and memory</p> Signup and view all the answers

    What happens when odorant binds to an olfactory receptor cell?

    <p>Depolarization of the cell and increased chances of an action potential</p> Signup and view all the answers

    What is the function of the accessory olfactory system?

    <p>Second chemoreceptor system for animals</p> Signup and view all the answers

    Which cranial nerves are responsible for carrying information about taste?

    <p>VII, IX, and X</p> Signup and view all the answers

    What type of sodium flow activates type 1 taste receptors?

    <p>Sodium ions flowing through an ion channel</p> Signup and view all the answers

    Where are taste receptors grouped together in the oral cavity?

    <p>In papillae on the tongue</p> Signup and view all the answers

    Which brainstem nucleus do the second order neurons synapse with first order neurons in taste pathways?

    <p>Nucleus of the solitary tract</p> Signup and view all the answers

    Where do the axons of third order neurons project to in taste pathways?

    <p>Gustatory cortex</p> Signup and view all the answers

    Are taste pathways typically ipsilateral or contralateral?

    <p>Ipsilateral (do not cross midline)</p> Signup and view all the answers

    Which cranial nerve is responsible for providing parasympathetic innervation to most of the viscera?

    <p>Cranial Nerve IX</p> Signup and view all the answers

    What type of fibers are found in cranial nerves responsible for motor input to smooth muscle and glands?

    <p>Visceral efferent fibers</p> Signup and view all the answers

    Which cranial nerves do not contain somatic efferent fibers?

    <p>Cranial Nerve I</p> Signup and view all the answers

    Which cranial nerve contains motor nerve fibers that send signals to the muscles of mastication?

    <p>Cranial Nerve V</p> Signup and view all the answers

    Which subtype of sensory fibers provide sensory information from internal structures?

    <p>Visceral afferent fibers</p> Signup and view all the answers

    Which group of cranial nerves is responsible for special senses like taste and smell?

    <p>Cranial Nerves I, II, and VII</p> Signup and view all the answers

    Where are the preganglionic neurons located for the sympathetic innervation of the smooth muscle and glands of the head?

    <p>In the intermediolateral horn of the thoracic spinal grey matter</p> Signup and view all the answers

    What neurotransmitter do preganglionic neurons release in sympathetic innervation of the head?

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

    Which receptors do epinephrine or norepinephrine bind to in postganglionic sympathetic neurons for head innervation?

    <p>Alpha or beta-adrenergic receptors</p> Signup and view all the answers

    Except for the salivary glands, what neurotransmitter is released by postganglionic sympathetic neurons for head innervation?

    <p>Epinephrine and Norepinephrine</p> Signup and view all the answers

    Which fibers convey somatosensory information from the face, skeletal muscle of the head, oral cavity, corneal, and teeth to the somatosensory cortex?

    <p>General somatic afferent fibers</p> Signup and view all the answers

    Where do second order neurons in the trigeminal sensory nuclei synapse?

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

    Where are the sensory and motor nuclei located in the CNS?

    <p>Mesencephalon, metencephalon, and myelencephalon</p> Signup and view all the answers

    Where do neurons carrying somatosensory information from the head synapse?

    <p>Trigeminal sensory nuclei</p> Signup and view all the answers

    Which cranial nerves have special visceral afferent fibers?

    <p>Facial nerve (VII)</p> Signup and view all the answers

    What is the primary location of cell bodies of upper motor neurons?

    <p>Primary motor cortex</p> Signup and view all the answers

    Which ganglia are associated with cranial nerves in the CNS?

    <p>Sensory ganglia and autonomic ganglia</p> Signup and view all the answers

    What is the function of autonomic ganglia in the CNS?

    <p>Sites of synapse between preganglionic and postganglionic neurons of the parasympathetic pathways</p> Signup and view all the answers

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