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Cards In This Set
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Diagrammatically show the structure of a Nerve Cell?
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What does the cell body contain?
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The cell body contains nucleus and organelles just like any other cell. It has well-developed RER and golgi (makes a lot of proteins).
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What is an axon?
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Axon = Conducting region of the nerve.
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What are axon terminals?
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Axon terminals = secretory regions of nerve.
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What are some other names for axon terminal?
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Other names for axon terminal = synaptic knob = bouton.
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What are dendrites?
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Dendrites are the receptive region of the nerve.
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What is the function of dendrites?
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The dendrites get input.
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How does branching in dendrites help?
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The branching helps to increase the surface area for reception.
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What is the Myelin sheath?
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Myelin sheath = Covers the axon intermittently, with gaps called nodes of Ranvier.
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What is the purpose of myelin sheath?
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The purpose of myelin sheath is to speed up conduction by insulating the nerve in intervals. This intermittent insulation causes action potential to jump from one node of Ranvier to the next.
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What is the function of Schwann cells?
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Schwann cells = makes myelin sheath in the peripheral nervous system by wrapping around the axon.
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What are Oligodendrocytes? What function do they perform?
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Oligodendrocytes = the central nervous system analogue of Schwann cells, makes myelin sheath around CNS axons.
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What performs insulation of axon?
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Insulation of axon = achieved by the myelin sheath.
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How is the insulation of axon performed?
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Insulation occurs in intervals, which causes action potential to jump from one node of Ranvier to the next.
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Why is Myelin sheath a good insulator?
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Myelin sheath is a good insulator because it is fatty and does not contain any channels.
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