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

What is the function of the accessory olfactory system?

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

Which cranial nerves are responsible for carrying information about taste?

<p>VII, IX, and X (C)</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 (B)</p> Signup and view all the answers

Where are taste receptors grouped together in the oral cavity?

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

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

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

Are taste pathways typically ipsilateral or contralateral?

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

Which cranial nerves do not contain somatic efferent fibers?

<p>Cranial Nerve I (B)</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 (A)</p> Signup and view all the answers

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

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

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

<p>Acetylcholine (A)</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 (B)</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 (B)</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 (C)</p> Signup and view all the answers

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

<p>Thalamus (A)</p> Signup and view all the answers

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

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

Where do neurons carrying somatosensory information from the head synapse?

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

Which cranial nerves have special visceral afferent fibers?

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

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

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

Which ganglia are associated with cranial nerves in the CNS?

<p>Sensory ganglia and autonomic ganglia (D)</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 (B)</p> Signup and view all the answers

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