Nervous System

    Nervous System
    What determines the response of the postsynaptic cell to autonomic impulses?
    It is the type of receptor on the postsynaptic membrane (not the neurotransmitter molecule) that determines how the postsynaptic cell responds.
    Author: rikazzz Comment
    Nervous System
    Where does the spinal cord start and finish?
    The foramen magnum is the hole in the occipital bone. Beyond L2, spinal nerves descend within the arachnoid mater but are not enclosed within the pia mater that covers the spinal cord.
    Author: rikazzz Comment
    Nervous System
    Which lobe of the brain is NOT named after the cranial bone to which it is deep?
    The insula is a deep lobe that is covered by the frontal and temporal lobes hence is not adjacent to any cranial bone.
    Author: rikazzz Comment
    Nervous System
    When we say that the cell membrane is polarised, we mean that:
    Polarised means that the charge is different on the two sides of the membrane, with the inside being negative with respect to the outside.
    Author: rikazzz Comment
    Nervous System
    Which of the following are NOT part of the cerebral cortex?
    The thalamus is part of the diencephalon, not the cerebral cortex (cerebrum).
    Author: rikazzz Comment
    Nervous System
    A multipolar neuron has more than one of what?
    Many dendrites are attached to the cell body of multipolar neurones.
    Author: rikazzz Comment
    Nervous System
    What characterises a spinal reflex?
    Peripheral stimulation produces an involuntary, unlearned predictable response that is not initiated from the brain.
    Author: rikazzz Comment
    Nervous System
    The inner ear (or internal ear) may be described as a series of tubes. What are the tubes filled with?
    Both perilymph and endolymph are contained in the scalae of the cochlea and the semi-circular canals of the labyrinth. The middle ear contains air.
    Author: rikazzz Comment
    Nervous System
    There are three ossicles in the middle ear. What are their names?
    Malleus, stapes and incus (aka hammer, stirrup, anvil) are in the middle ear. The stapedius is a muscle, while the cochlea is the inner ear.
    Author: rikazzz Comment
    Nervous System
    Which of the following substances is prevented from entering the brain by the blood-brain barrier?
    Many pharmaceuticals are unable to cross the BBB.
    Author: rikazzz Comment