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Q. No.From outside to inside, the sequence of three bones present in the middle ear of mammals is
1. malleus, stapes and incus
2. stapes, malleus and incus
3. malleus, incus and stapes
4. incus, malleus and stapes
74%
Level 2: 60%+
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Subtopic: Action Potential |
79%
Level 2: 60%+
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72%
Level 2: 60%+
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Autonomic nervous system affects
1. reflex actions
2. sensory organs
3. internal organ
4. all of the above
1. reflex actions
2. sensory organs
3. internal organ
4. all of the above
66%
Level 2: 60%+
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Nerve impulse
Choose the correct answer from the options given below:
1. A and E only
2. B, C and D only
3. C, D and E only
4. B and D only
| A. | during the propagation of a nerve impulse, the action potential results from the movement of K ions from extracellular fluid to intracellular fluid |
| B. | electrical synapses are very rare in the human system |
| C. | receptor sites for neurotransmitters are present on the presynaptic membrane |
| D. | when the impulse reaches the presynaptic region, synaptic vesicles break and release neurotransmitters |
| E. | impulse through nerve fibers is unidirectional because nerve fibers are insulated by a medullary sheath |
1. A and E only
2. B, C and D only
3. C, D and E only
4. B and D only
Subtopic: Origin of Resting Membrane Potential | Action Potential | Synapse |
77%
Level 2: 60%+
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An action potential in the nerve fibre is produced when positive and negative charges on the outside and the inside of the axon membrane are reversed, because
| 1. | More potassium enters the axon as compared to sodium ions leaving it |
| 2. | More sodium enters the axon as compared to potassium ions leaving it |
| 3. | All potassium ions leave the axon |
| 4. | All sodium ions enter the axon |
Subtopic: Action Potential |
80%
Level 1: 80%+
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Human ear ossicles are?
1. incus and stapes
2. stapes
3. incus, malleus and stapes
4. incus and malleus
1. incus and stapes
2. stapes
3. incus, malleus and stapes
4. incus and malleus
92%
Level 1: 80%+
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Subtopic: Diencephalon |
96%
Level 1: 80%+
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Function of the hypothalamus is:
1. thermoregulation
2. water balance
3. control of hormone function
4. All of the above
1. thermoregulation
2. water balance
3. control of hormone function
4. All of the above
Subtopic: Diencephalon |
Level 4: Below 35%
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Subtopic: Diencephalon |
94%
Level 1: 80%+
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