1. | Impulse Transmission across a chemical synapse is always faster than that across an electrical synapse. |
2. | The membranes of presynaptic and postsynaptic neurons are in close proximity in an electrical synapse. |
3. | Electrical current can flow directly from one neuron into the other across the electrical synapse. |
4. | Chemical synapses use neurotransmitters. |
Assertion (A): | Electrical synapses are rare in our neural system |
Reason (R): | Electrical synapses are faster than the chemical synapses. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |
1. | Effector → Sensory neuron → Interneuron → Motor neuron → Receptor |
2. | Receptor → Motor neuron → Interneuron → Sensory neuron → Effector |
3. | Receptor → Sensory neuron → Interneuron → Motor neuron → Effector |
4. | Sensory neuron → Effector → Receptor → Motor neuron → Interneuron |
List-I | List-II | ||
A. | Limbic system | I. | Body temperature |
B. | Arachnoid | II. | Tract of nerve fibres |
C. | Corpus callosum | III. | Amygdala |
D. | Hypothalamus | IV. | Cranial meninge |
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 |
List I | List II | ||
A. | Pons | I. | Provides additional space for Neurons, regulates posture and balance |
B. | Hypothalamus | II. | Controls respiration and gastric secretions |
C. | Medulla | III. | Connects different regions of the brain |
D. | Cerebellum | IV. | Neuro secretory cells |
List-I | List-II | ||
(a) | Multipolar neuron | (i) | Somatic neural system |
(b) | Bipolar neuron | (ii) | Cerebral cortex |
(c) | Myelinated nerve fibre | (iii) | Retina of Eye |
(d) | Unmyelinated nerve fibre | (iv) | Spinal nerves |
(a) | (b) | (c) | (d) | |
1. | (iii) | (i) | (iv) | (ii) |
2. | (ii) | (iv) | (iii) | (i) |
3. | (ii) | (iii) | (i) | (iv) |
4. | (ii) | (iii) | (iv) | (i) |
Receptor sites for neurotransmitters are present on:
1. Pre-synaptic membrane
2. Tips of axons
3. Post-synaptic membrane
4. Membrane of synaptic vesicles