The diagram given below is a representation of a certain phenomenon pe

1.	The diagram given below is a representation of a certain phenomenon pertaining to the nervous system. Study the diagram and answer the following questions :(i) Name the phenomenon that is being depicted. (ii) Give the technical term for the point of contact between the two nerve cells. (iii) Name the parts 1, 2, 3 and 4. (iv) Write the functions of parts 5 and 6. (v) How does the arrangement of neurons in the spinal cord differ from that of the brain ?
Answer» (i) Reflex action. (ii) Synapse (iii) 1. Sensory/Afferent neuron. 2. Dorsal ganglion/Dorsal root. 3. White matter 4. Grey matter (iv) Function of 5 (Synape): Transmit the sensory impulse from sensory neuron to the motor neuron. Function of 6 (Motor neuron/Efferent neuron): Transmit the command to the effectors (muscle or glands). (v) In Brain: Gray matter on the outerside and white matter on inner side. In Spinal cord: White matter on the outerside and Gray matter on inner side.

The diagram given below is a representation of a certain phenomenon pertaining to the nervous system. Study the diagram and answer the following questions :(i) Name the phenomenon that is being depicted. (ii) Give the technical term for the point of contact between the two nerve cells. (iii) Name the parts 1, 2, 3 and 4. (iv) Write the functions of parts 5 and 6. (v) How does the arrangement of neurons in the spinal cord differ from that of the brain ?

Answer»

(i) Reflex action.

(ii) Synapse

(iii) 1. Sensory/Afferent neuron.

2. Dorsal ganglion/Dorsal root.

3. White matter

4. Grey matter

(iv) Function of 5 (Synape): Transmit the sensory impulse from sensory neuron to the motor neuron.

Function of 6 (Motor neuron/Efferent neuron): Transmit the command to the effectors (muscle or glands).

(v) In Brain: Gray matter on the outerside and white matter on inner side.

In Spinal cord: White matter on the outerside and Gray matter on inner side.