Nervous System

    Nervous System
    Which of the following is true of unipolar neurons?
    These sensory neurons have their cell bodies in the dorsal root ganglion. Choice A would be true of anaxonic neurons. Choice C would be true of multipolar neurons. Choice D would be true of bipolar neurons.
    Author: rikazzz Comment
    Nervous System
    What is the name of the lobe of the brain that is immediately superior to the cerebellum?
    The cerebellum nestles into the cerebrum immediately inferior to the occipital lobe.
    Author: rikazzz Comment
    Nervous System
    Two ways that cells can communicate within the body are by synaptic communication or by endocrine communication. A difference between the two is:
    A synapse is a communication between one cell and another adjacent cell, separated only by the synaptic cleft.
    Author: rikazzz Comment
    Nervous System
    Choose the answer that correctly completes the sentence. The “lens” of the human eye:
    The lens, by having its degree of convexity altered, can have its focal length changed. It is in fact biconvex.
    Author: rikazzz Comment
    Nervous System
    Which muscle(s) are NOT controlled by the autonomic nervous system?
    Skeletal muscle is under our conscious control and innervated by the somatic nervous system, which is one part of the efferent division of the peripheral nervous system.
    Author: rikazzz Comment
    Nervous System
    What is the effect of the movement of Na+ into a nerve cell followed very soon by the movement of K+ out of the nerve cell?
    When Na+ moves into a nerve cell, the cell depolarises (from −70 mV to about +30 mV); when soon afterwards K+ moves out of the nerve cell, it repolarises (from +30 mV back to −70 mV).
    Author: rikazzz Comment
    Nervous System
    Which one of the following statements is WRONG?
    The middle (not outer) ear is filled with air and is vented to the mouth via the Eustachian tube.
    Author: rikazzz Comment
    Nervous System
    What does the term “synapse” refer to?
    The impulse carried by a nerve cell is transferred by neurotransmitter to the stimulated cell by this structure at the point of contact. Choice C describes the synaptic cleft.
    Author: rikazzz Comment
    Nervous System
    What is the light sensitive cell in the retina that responds to colour called?
    Remember “c” for cone and “c” for colour. Rods are used for conditions where the intensity of light is low (the conditions are “scotopic”, e.g. at night).
    Author: rikazzz Comment
    Nervous System
    What type of nerves is found in the dorsal root?
    Afferent (or sensory) nerves/neurons are in the dorsal root of the spinal nerves.
    Author: rikazzz Comment