What is an action potential ? from Biology Neural Control and C

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 Multiple Choice QuestionsShort Answer Type

81. Write a note on different divisions of nervous systems.
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82. Define the term reflex action and discuss its types.
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 Multiple Choice QuestionsLong Answer Type

83.

Discuss the mechanism of reflex action.

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 Multiple Choice QuestionsShort Answer Type

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84. What is an action potential ?


Action potential : It is a very rapid change in axon membrane potential from the negative resting potential to a positive peak and then back to resting potential. It is the electrical potential difference across the plasma membrane at the site of the stimulus is called active potential. 

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85. Why does the nerve impulse flow more rapidly in myelinated nerve fibres than in the non-myelinated fibres ?
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86. Draw labelled diagram of the following
(d) Ear.
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87. State one difference between the afferent and the efferent fibres.
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88.

Differentiate between 

(e) Cerebrum and Cerebellum

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89. Describe the main properties of nervous tissue.
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90. Define receptor and classify it.
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