Read the following given statements and choose the correct option with respect to mechanism of vision.
Statement A: The light rays in visible wavelength focussed on the retina through the cornea and lens generate potentials in rods and cones. Statement B: The image formed on the retina is recognised based on the earlier memory and experience.
(1) Both statements are correct
(2) Both statements are incorrect
(3) Only statement A is correct
(4) Only statement B is correct
Statement A: The light rays in visible wavelength focussed on the retina through the cornea and lens generate potentials in rods and cones. Statement B: The image formed on the retina is recognised based on the earlier memory and experience.
Subtopic: Â Human Eye (OLD NCERT) |
 83%
From NCERT
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In a resting membrane , K+ passively moves from
1. Axoplasm to ECF by diffusion
2. ECF to axoplasm by diffusion
3. Axoplasm to ECF by gated channels
4. ECF to axoplasm by gated channels
1. Axoplasm to ECF by diffusion
2. ECF to axoplasm by diffusion
3. Axoplasm to ECF by gated channels
4. ECF to axoplasm by gated channels
Subtopic: Â Origin of Resting Membrane Potential |
From NCERT
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Basilar membrane is in contact above and below with which fluid respectively ?
Below Above
1. Endolymph Perilymph
2. Perilymph Perilymph
3. Endolymph Endolymph
4. Perilymph Endolymph
Below Above
1. Endolymph Perilymph
2. Perilymph Perilymph
3. Endolymph Endolymph
4. Perilymph Endolymph
Subtopic: Â Inner Ear: Cochlea (OLD NCERT) |
 59%
From NCERT
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Transport of sodium and potassium ions across axonal membrane:
| 1. | is active through sodium-potassium pump and passive through sodium and potassium channels |
| 2. | is active through both sodium-potassium pump through sodium and potassium channels |
| 3. | is passive through both sodium-potassium pump through sodium and potassium channels |
| 4. | is passive through sodium-potassium pump and active through sodium and potassium channels |
Subtopic: Â Origin of Resting Membrane Potential |Â Action Potential |
 67%
From NCERT
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Medulla oblongata:
| 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 |
Subtopic: Â Neuroanatomy |Â Hind & Mid Brain |
 83%
From NCERT
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Identify A, B, C and D in the diagrammatic representation of reflex action, showing knee jerk reflex:
| 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 |
Subtopic: Â Hind & Mid Brain |Â Autonomic Nervous System (OLD NCERT) |
 79%
From NCERT
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Regarding the given diagram showing parts of an eye, identify the incorrect match:
| 1. | A | Major refractory surface |
| 2. | B | Accommodation |
| 3. | C | Regulates diameter of pupil |
| 4. | D | Point of highest visual acuity |
Subtopic: Â Human Eye (OLD NCERT) |
 71%
From NCERT
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Which structure enables the communication between the left and right cerebral hemispheres in the human brain?
| 1. | Foramen of Monroe | 2. | Cerebral aqueduct of Sylvius |
| 3. | Corpus callosum | 4. | Cerebellar peduncles |
Subtopic: Â Diencephalon |
 91%
From NCERT
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In the human eye:
| 1. | the choroid is avascular |
| 2. | lens is held in place by ligaments attached to the ciliary body |
| 3. | photopic vision and colour perception is a function of rods |
| 4. | aqueous humor has a gel-like consistency |
Subtopic: Â Human Eye (OLD NCERT) |
 83%
From NCERT
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Identify the incorrectly matched pair:
| 1. | Medulla oblongata | Gastric secretions |
| 2. | Hypothalamus | Control of body temperature |
| 3. | Limbic system | Behaviour |
| 4. | Association areas | Purely sensory areas in the cerebrum |
Subtopic: Â Diencephalon |
 71%
From NCERT
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