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Neural Control and Coordination

Short Answer Type

111. Are rods and cones evenly distributed over the entire surface of the retina? At which point on the retina is no image formed ?

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112. Which nerve tract connects the right and left hemispheres of cerebrum ? Into what four lobes is each hemisphere divided ?

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113. Chemical synapse is more advantageous than electrical synapse. Discuss.

The advantage of a chemical synapse is that one neurotransmitter impulse can cause the action of multiple muscle cells, for example, whereas an electrical impulse is less versatile.

Moreover in chemical synapses there are different types of messenger neurotransmitters in different synapses permitting different kinds of responses.

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