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Q. No.The somatic neural system relays impulses from:
1.
the CNS to skeletal muscles
2.
the CNS to the involuntary organs and smooth muscles of the body
3.
the skeletal muscles of the CNS
4.
the involuntary organs and smooth muscles of the body to the CNS
Subtopic: Nervous System |
76%
From NCERT
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Consider the two statements regarding the human internal ear:
| Statement I: | The malleus is attached to the tympanic membrane and the stapes is attached to the oval window of the cochlea. |
| Statement II: | At the base of the cochlea, the scala vestibuli ends at the round window, while the scala tympani terminates at the oval window which opens to the middle ear. |
| 1. | Statement I is incorrect; Statement II is correct |
| 2. | Statement I is correct; Statement II is correct |
| 3. | Statement I is correct; Statement II is incorrect |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Outer & Middle Ear (OLD NCERT) | Inner Ear: Cochlea (OLD NCERT) |
56%
From NCERT
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Identify A, B and C in the given figure showing sectional view of cochlea:
| A | B | C | |
| 1. | Reissener’s membrane | Tectorial membrane | Basilar membrane |
| 2. | Basilar membrane | Reissener’s membrane | Tectorial membrane |
| 3. | Tectorial membrane | Basilar membrane | Reissener’s membrane |
| 4. | Reissener’s membrane | Basilar membrane | Tectorial membrane |
Subtopic: Inner Ear: Cochlea (OLD NCERT) |
81%
From NCERT
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What type of neuron is found in the human retina and olfactory membrane?
1. Unipolar
2. Bipolar
3. Multipolar
4. Pseudo-unipolar
1. Unipolar
2. Bipolar
3. Multipolar
4. Pseudo-unipolar
Subtopic: Nervous System |
94%
From NCERT
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Unmyelinated nerve fibre:
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
| I: | is enclosed by a Schwann cell that does not form a myelin sheath around the axon |
| II: | is commonly found in autonomous and the somatic neural systems |
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Nervous System |
86%
From NCERT
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The eye ball contains a transparent crystalline lens which is held in place by:
| 1. | iris anteriorly and choroid posteriorly |
| 2. | vitreous humor |
| 3. | sclera |
| 4. | ligaments attached to the ciliary body |
Subtopic: Basic Anatomy of Human Eye: 1 (OLD NCERT) |
89%
From NCERT
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Myelin sheath around axons in peripheral nervous system and in central nervous system is produced respectively by:
1. Schwann cells; microglia
2. oligodendrocytes; Schwann cells
3. Schwann cells; oligodendrocytes
4. satellite cells; astrocytes
Subtopic: Nervous System |
71%
From NCERT
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In the human eye:
I: The sclera regulates entrance of light into the eyeball.
II: The choroid makes colour vision possible.
III: The ciliary body controls the lens shape for near and far vision.
1. Only III is incorrect
2. Only I and II are incorrect
3. Only I and III are correct
4. I, II and III are correct
Subtopic: Basic Anatomy of Human Eye (OLD NCERT) |
57%
From NCERT
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Identify the correctly matched pairs:
| Part of human brain | Function | |
| I | Corpus callosum | Tract of nerve fibres connecting two cerebellar hemispheres |
| II | Thalamus | Major coordinating centre for sensory and motor signaling |
| III | Hypothalamus | Control of body temperature, urge for eating and drinking |
| IV | Limbic system | Equilibrium |
| V | Medulla | Pneumotaxic centre for regulation of breathing |
2. II and III only
3. I, III and V only
4. I, II, III and IV only
Subtopic: Hind & Mid Brain | Diencephalon | Cerebrum, EEG & Sleep |
From NCERT
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Given below is the chronological sequence of events in mechanisms of vision and hearing. The correct events are:
1. Only A
2. Only B
3. Both A and B
4. Neither A nor B
| A | Mechanism of vision | Light induces dissociation of the retinal from opsin → change in the structure of the opsin → membrane permeability changes → generation of action potentials in the ganglion cells through the bipolar cells → action potentials are transmitted by the optic nerves to the visual cortex. |
| B | Mechanism of hearing | Vibrations are transmitted through the ear ossicles to the round window → vibrations generate waves in the lymphs → this induces a ripple in the Reissner’s membrane → the hair cells press them against the basilar membrane → nerve impulses generated are transmitted to the auditory cortex. |
2. Only B
3. Both A and B
4. Neither A nor B
Subtopic: Huma Eye: Accommodation (OLD NCERT) | Human Eye: Adaptation (OLD NCERT) | Inner Ear: Cochlea (OLD NCERT) | Basic Anatomy of Human Eye (OLD NCERT) |
61%
From NCERT
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