Sensory Systems Classification
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Questions and Answers

Which cranial nerve is associated with the sense of smell?

  • Facial (VII)
  • Optic (II)
  • Olfactory (I) (correct)
  • Vestibulocochlear (VIII)
  • Which spinal nerve plexus innervates the hip and lower limbs?

  • Sacral plexus
  • Lumbar plexus (correct)
  • Brachial plexus
  • Cervical plexus
  • What type of neurons are found in the ventral root of a spinal nerve?

  • Sympathetic trunk ganglion neurons
  • Axons of sensory neurons
  • Autonomic and somatic motor neurons (correct)
  • Cell bodies located in dorsal root ganglia
  • Which spinal nerve connects to the diaphragm?

    <p>Phrenic nerve</p> Signup and view all the answers

    What surrounds each individual axon and myelin in a spinal nerve?

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

    Which structure controls the shape of the lens and causes the lens to focus?

    <p>Ciliary muscles</p> Signup and view all the answers

    What is the function of the fovea centralis?

    <p>Area of greatest visual acuity</p> Signup and view all the answers

    Which part of the eye is avascular and transparent?

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

    What causes the tympanic membrane to vibrate?

    <p>Sound waves</p> Signup and view all the answers

    Which structure links the middle ear with the nasopharynx?

    <p>Eustachian tube</p> Signup and view all the answers

    What is the function of the bony labyrinth in the inner ear?

    <p>Detect sound and important for equilibrium</p> Signup and view all the answers

    What is found in the cochlear duct?

    <p>Hair cells with cilia</p> Signup and view all the answers

    What separates the cochlear duct from the scala tympani?

    <p>Basilar membrane</p> Signup and view all the answers

    What is responsible for sending electrical impulses to the brain via cranial nerve VIII (vestibulocochlear nerve)?

    <p>Hair cells with cilia</p> Signup and view all the answers

    What type of stimuli do interoceptors detect?

    <p>Internal stimuli in viscera and blood vessels</p> Signup and view all the answers

    Which stimuli do mechanoreceptors respond to?

    <p>Mechanical stimuli like pressure and touch</p> Signup and view all the answers

    How many successive neurons do spinal pathways consist of?

    <p>Three successive neurons</p> Signup and view all the answers

    Which tracts are included in the ascending tracts of spinal pathways?

    <p>Posterior (dorsal) column pathways, spinocerebellar pathways, and corticospinal pathways</p> Signup and view all the answers

    What are the effectors of the Autonomic Nervous System?

    <p>Cardiac muscle, smooth muscle, and glands</p> Signup and view all the answers

    What does the Somatic Nervous System involve?

    <p>Upper and lower motor neurons for skeletal muscle control</p> Signup and view all the answers

    What are the subdivisions of the Autonomic Nervous System?

    <p>Sympathetic NS and Parasympathetic NS</p> Signup and view all the answers

    What are the differences between Sympathetic NS and Parasympathetic NS?

    <p>Differences in cell body of preganglionic neuron, autonomic ganglia location, axon length, function, and nerve exit points.</p> Signup and view all the answers

    What is the superficial layer of the eye called?

    <p>Fibrous tunic</p> Signup and view all the answers

    Study Notes

    Sensory Systems Classification

    • Interoceptors detect internal stimuli in viscera, blood vessels, etc.
    • Mechanoreceptors respond to mechanical stimuli like pressure, touch, stretch, and vibration.
    • Spinal pathways consist of three successive neurons: 1st order neurons, 2nd order neurons, and 3rd order neurons.
    • Ascending tracts of spinal pathways include posterior (dorsal) column pathways, spinocerebellar pathways, and anterolateral (spinothalamic) pathways.
    • The motor systems include the Somatic Nervous System and the Autonomic Nervous System.
    • The Somatic Nervous System involves upper and lower motor neurons for skeletal muscle control.
    • The Autonomic Nervous System has preganglionic and postganglionic neurons, with the effectors being cardiac muscle, smooth muscle, and glands.
    • The Autonomic Nervous System is subdivided into the sympathetic NS and the parasympathetic NS, which have different functions.
    • Comparison of Sympathetic NS and Parasympathetic NS includes differences in the cell body of preganglionic neuron, autonomic ganglia location, axon length, function, and nerve exit points.
    • The eye is a three-layered sphere filled with fluid, with the fibrous tunic as the superficial layer.
    • The fibrous tunic includes the sclera, cornea, and conjunctiva, serving as protective and light-permitting structures for the eye.

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    Anatomy Notes Week 12 PDF

    Description

    Test your knowledge of sensory systems and motor systems, including interoceptors, mechanoreceptors, spinal pathways, and the autonomic and somatic nervous systems.

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