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				Nervous System Multiple Questions and Answers.		
		           
         
        
		   
		       Exercise Questions ::
		       Human Physiology
 
		
		    
			   |  | Answer:  Option  Answer: c | 
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		|  | Explanation: Neurons are made up of three parts, i.e., cell body, dendrites, and axon. The cell body consists of ribosomes and a cluster of endoplasmic reticulum, which is known as Nissl bodies. | 
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			Published by:Saba Ibrahim
		 
		
		    
			   |  | Answer:  Option  Answer: a | 
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		|  | Explanation: Endoplasmic reticulum is not present in axons as it does not synthesize protein. An axon contains mitochondria, neurofibril, and microtubule and the cytoplasm of an axon is called axoplasm. | 
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			Published by:Saba Ibrahim
		 
| 8. | Name the multipolar neuron which is located entirely within the central nervous system. | 
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		|  | A. | Motor neuron | 
|  | B. | Efferent neuron | 
|  | C. | Afferent neuron | 
|  | D. | Interneuron | 
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			   |  | Answer:  Option  Answer: d | 
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		|  | Explanation: Interneurons are the multipolar neurons, which are found within the CNS. Motor neurons are also known as efferent neurons, they transfer signals from the CNS to effector organs. | 
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			Published by:Saba Ibrahim
		 
| 9. | Out of the following, which one does not affect the speed of conduction of nerve  impulse. | 
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		|  | A. | No. of ganglia | 
|  | B. | Myelin sheath | 
|  | C. | Axon diameter | 
|  | D. | Temperature | 
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			   |  | Answer:  Option  Answer: a | 
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		|  | Explanation: The speed of conduction of nerve impulse depends upon three factors, i.e., myelin sheath, temperature, and axon diameter. Higher the temperature higher would be the speed and also larger the diameter higher the speed. | 
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			Published by:Saba Ibrahim
		 
	    
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