Q. No.Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A):
The same neurotransmitter, acetylcholine, may be inhibitory at some places like heart and excitatory elsewhere like alimentary canal.
Reason (R):
The cells involved in each case have different receptors for ACh that produce different effects.
In the light of the above statements choose the correct answer from the options given below:
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.
Both (A) and (R) are false.
In the light of the above statements choose the correct answer from the options given below:
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | Action potential propagation in unmyelinated neurons is faster than in myelinated neurons. |
| Reason (R): | Myelin is a complex polysaccharide and it slows the conduction of the impulse along the axonal membrane. |
In the light of the above statements choose the correct answer from the options given below:
| 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. | Both (A) and (R) are false. |
Assertion: Auditory transduction is the function of the organ of Corti.
Reason: Organ of Corti is located in the scala media of cochlea of inner ear.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
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Assertion: Contraction of ciliary muscles reduces the refractory power of the lens.
Reason: Contraction of ciliary muscles leads to increase in the pull of suspensory ligaments making lens more flat.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | Damage to cerebellum may cause ataxia and dysarthria. |
| Reason (R): | The cerebellum plays an important role in motor control. |
In the light of the above statements choose the correct answer from the options given below:
| 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. | Both (A) and (R) are false. |
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | People with extensive, bilateral hippocampal damage may experience anterograde amnesia (the inability to form and retain new memories). |
| Reason (R): | The hippocampus belongs to the limbic system and plays important roles in the consolidation of information from short-term memory to long-term memory. |
In the light of the above statements choose the correct answer from the options given below:
| 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. | Both (A) and (R) are false. |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | Once initiated, the action potential has a magnitude that is independent of the strength of the triggering stimulus. |
| Reason (R): | Action potentials are all or none responses to stimuli. |
In the light of the above statements choose the correct answer from the options given below:
| 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. | Both (A) and (R) are false. |
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | The resting membrane potential in a neuron is much closer to the equilibrium potential of K+ ions than it is to equilibrium potential of Na+ ions. |
| Reason (R): | While potassium is the principal cation in the intracellular fluid, sodium is the principal cation in the extracellular fluid. |
In the light of the above statements choose the correct answer from the options given below:
| 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. | Both (A) and (R) are false. |
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The re-establishment of the resting membrane potential after depolarization is primarily due to:
| 1. Sodium potassium pump | 2. Influx of sodium |
| 3. Efflux of potassium | 4. Efflux of sodium |
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To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
In the human eye, there are three types of cones – red blue and green. When these cones are stimulated equally, a sensation for which of the following colors would be produced?
| 1. White | 2. Black |
| 3. Orange | 4. Yellow |
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