Nervous tissue Quiz



{The high content of Nissl bodies in neuron perikaryon directly reflects what characteristics of nerves? - high metabolic demands for ATP + production of high levels secretory proteins - synthesis of high levels of ribosomal RNAs - accumulation of protein bodies leads to neurodegeneration - tight regulation of electrical impulses and ions
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{Bipolar neurons are located - Throughout the PNS & CNS - Sensory neurons in the PNS only - Motor neurons in the PNS only - Parasympathetic ganglion of cranial nerves + ganglion of cranial nerve VIII and retina
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{Which cell type of the CNS or PNS is not derived from neuroectoderm? + microglia - terminals en passants - oligodendrocytes - schwann cells - astrocytes
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{What must be true of vesicles traveling quickly in retrograde direction in an axon? + Vesicle is attached to a dyenin motor protein - vesicle is traveling by diffusion - it is traveling away from the nucleus - vesicle is moving along a collagen fibril - vesicle originated from an axon potential
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{Which is true of the ionic channels or gradients of a resting neuron? - Inside of the cell maintains a high sodium concentration - Potassium remain channels open and K+ levels are at equilibrium - Surrounding extracellular fluid maintains a -60mW negative charge + Calcium concentration is greater outside of the cell
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{The following statements about action potentials are true EXCEPT for: - The inside of the neuron becomes positively charged following an action potential + The size of a single action potential is proportional to the nerve stimulation - a threshold signal must be sensed at the axon hillock for an impulse to be potentiated - Neurotransmitters bind to chemical-gated channels in the dendrites leading to sodium influx
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{Axons synapse onto which of the following structures? - axons - dendrites - neuron cell body - skeletal muscle + all of the above - none of the above
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{Match each cell type with its location in the body -+ Schwann Cells +- Oligodendrocytes ++ Myelinated neuron +- Astrocytes ++ Glia -+ Bipolar neurons ++ Multipolar neurons +- Microglia
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 * CNS|PNS

{T/F: The white matter does not contain neuronal cell bodies + True - False
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{Gray matter contains the following EXCEPT: - neuronal cell bodies, - dendrites - unmyelinated axons and glia + periphery of the spinal cord
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