ECOLOGY
NEURAL CONTROL AND INTEGRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Electrical synapses are more common in our neural system than chemical synapses
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The new potential in post synaptic neuron may be either excitatory or inhibitory
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Hypothalamus is the major coordination centre for sensory and motor signaling
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The tracts of nerve fibres that connect two cerebral hemispheres are called corpora bigemina
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Detailed explanation-1: -Answer is b) The new potential in the post synaptic neuron can be either excitatory or inhibitory. If reverse potential occurs in relation to threshold potential at the post synaptic neuron then the inhibitory potential is generated otherwise excitatory potential is generated.
Detailed explanation-2: -While electrical synapses are fewer in number than chemical synapses, they are found in all nervous systems and play important and unique roles. The mode of neurotransmission in electrical synapses is quite different from that in chemical synapses.
Detailed explanation-3: -So, the correct answer is ‘Signals can move in either direction across the synapse’.
Detailed explanation-4: -Synapse – The junction between the axon of one neuron and the dendrite of another, through which the two neurons communicate.
Detailed explanation-5: -Because electrical synapses do not involve neurotransmitters, electrical neurotransmission is less modifiable than chemical neurotransmission. The response is always the same sign as the source.