Identify the correct statement:
1. | Unmyelinated neurons in PNS are not surrounded by Schwann cell |
2. | Electrical synapses, being faster, are more common in the human body |
3. | Pia mater is in contact with the brain tissue |
4. | The entire hindbrain and the midbrain constitute the brain stem |
Identify the incorrect match:
1. | Reticular formation | Gatekeeper to consciousness |
2. | Thalamus | Major relay centre in diencephalon for messages to the cortex |
3. | Superior colliculi | Part of limbic system for emotional behaviour |
4. | Pons | Part of hindbrain having nuclei for control of breathing rate |
I: | When a neuron is not conducting any impulse, i.e., resting, the axonal membrane is comparatively more permeable to potassium ions (K+ ) and nearly impermeable to sodium ions (Na+). |
II: | Similarly, the membrane is permeable to negatively charged proteins present in the axoplasm. |
Consider the following statements:
I: | Impulses travel by the visceral nervous system from the CNS to the viscera and from the viscera to the CNS. |
II: | Impulses travel by the autonomic nervous system from the CNS to the involuntary organs and smooth muscles of the body. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
I: | is a part of the brain stem |
II: | is a part of the hind brain |
III: | is a part of the limbic system |
1. | Only I and II | 2. | Only I and III |
3. | Only II and III | 4. | I, II and III |
A | B | C | D | |
1. | Muscle spindle | Motor end plate | Afferent pathway | Efferent pathway |
2. | Muscle spindle | Motor end plate | Efferent pathway | Afferent pathway |
3 | Motor end plate | Muscle spindle | Efferent pathway | Afferent pathway |
4. | Motor end plate | Muscle spindle | Afferent pathway | Efferent pathway |
1. | Medulla oblongata | Gastric secretions |
2. | Hypothalamus | Control of body temperature |
3. | Limbic system | Behaviour |
4. | Association areas | Purely sensory areas in the cerebrum |
1. | Limbic system | Behaviour |
2. | Medulla oblongata | Gastric secretions |
3. | Hypothalamus | Thermoregulation |
4. | Corpus callosum | Connects cerebellum with rest of the brain |
I: | The resting axonal membrane is relatively more permeable to potassium ions and nearly impermeable to sodium ions. |
II: | Sodium potassium pump transports 3 Na+ outwards for 2 K+ into the cell. |
1. | Only I |
2. | Only II |
3. | Both I and II |
4. | Neither I nor II |
Identify the correct statement:
1. Sympathetic neural system is excitatory to the heart and inhibitory to the gut
2. Sympathetic neural system is inhibitory to the heart and excitatory to the gut
3. Sympathetic neural system is excitatory to the heart and to the gut
4. Sympathetic neural system is inhibitory to the heart and to the gut