| List - I | List – II | ||
| A. | Schwann cells | i. | Neurotransmitter |
| B. | Synaptic knob | ii. | Cerebral cortex |
| C. | Bipolar neurons | iii. | Myelin sheath |
| D. | Multipolar neurons | iv. | Retina |
The correct matches are:
• Schwann cells form the myelin sheath around axons. (A-III)
• The synaptic knob contains neurotransmitters. (B-I)
• Bipolar neurons are found in the retina. (C-IV)
• Multipolar neurons are found in the cerebral cortex. (D-II)
Therefore, the correct option is (1): A-III, B-I, C-IV, D-II.
Which part of the human brain is responsible for:
(a) thinking
(b) picking up a pencil
(c) controlling blood pressure
(d) controlling hunger
A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is : 
AB is a part of an electrical circuit (see figure). The potential difference \(V_A - V_B\), at the instant when current \(i = 2\) A and is increasing at a rate of 1 amp/second is:
Three identical heat conducting rods are connected in series as shown in the figure. The rods on the sides have thermal conductivity 2K while that in the middle has thermal conductivity K. The left end of the combination is maintained at temperature 3T and the right end at T. The rods are thermally insulated from outside. In steady state, temperature at the left junction is \(T_1\) and that at the right junction is \(T_2\). The ratio \(T_1 / T_2\) is 