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- Regeneration of a severed axon has a better chance forsuccess in the PNS than in the CNS. Why is regeneration inthe CNS less likely to succeed?This cell provides myelination within the centrallnervous system, allowing for, speed of conduction of the action potential O astrocytes, increased O microglia, decreased O neurons, decreased O oligodendrocytes, increasedWhat are the main differences between the sympathetic and parasympathetic branches of the autonomic nervous system?
- What type of neurons, based on function, are multipolar neurons that conduct impulses within the central nervous system (CNS)? O Afferent neurons O Bipolar neurons O Sensory neurons O Unipolar neurons O InterneuronsWhere do fibrous astrocytic processes contact the axonal membranes in the CNS? The internode The paranode The juxtaparanode The nodeWhat important function could be diminished if the cilia on ependymal cells were absent? O circulation of cerebrospinal fluid O formation of myelin sheath around PNS axons O phagocytosis of microorganisms or dead neurons in the CNS O nerve impulse transmission
- Neuroglial cells in the peripheral nervous system composed of myelin that are wound tightly around axons to provide an insulating layer are called Dendrites O Astrocytes O Microglial cells O Schwann cellsAxon can't branch Afferent neurons are generally bipolar neurons Most neurotransmitters are synthesized in the cytosol of a neuron GABA is the most common inhibitory neurotransmitter in the central nervous system Tendons are regular dense connective tissue that connect muscles to boneWhich of the following cell types would contain an axon? O neuron O neuroglia O fibrocyte O osteocyte
- Multiple sclerosis is a disease in which theimmune system attacks and destroys the myelin sheath surroundingnerve cells. What effect would you expect the loss of myelin tohave on the speed of nerve impulses?Collections of nerve cell bodies inside .39 :the PNS are called nerves O ganglia O tracts O nuclei OParkinson disease is the result of decreased levels of theneurotransmitter dopamine in the brain. However, thesepatients can’t take dopamine in drug form because the drugcannot reach the brain. What anatomic structure preventsthe drug from reaching the brain? How could these sameanatomic structures be beneficial to an individual underdifferent circumstances?