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Q. No.Identify the incorrect statement:
1.
The central nervous system includes the brain and the spinal cord.
2.
The peripheral nervous system comprises of all the nerves of the body associated with the central nervous system.
3.
The afferent nerve fibers transmit regulatory impulses from the central nervous system to the concerned peripheral tissues or organs.
4.
The peripheral nervous system is divided into two divisions called somatic neural system and autonomic neural system
Subtopic: Nervous System | Motor Functions of Spinal Cord |
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During the propagation of a nerve impulse, the membrane potential changes in a specific pattern. Which of the following correctly describes the sequence of events in the generation of an action potential?
| 1. | The membrane potential remains constant, indicating a steady state of ion exchange across the neuron membrane. |
| 2. | Sodium ions rapidly enter the neuron, causing the membrane potential to become more negative, followed by the exit of potassium ions which restores the membrane to its resting potential. |
| 3. | Potassium ions rapidly exit the neuron, leading to hyperpolarization first, followed by sodium ions entering the neuron to return to the resting potential. |
| 4. | Sodium ions rapidly enter the neuron, making the inside more positive (depolarization), followed by potassium ions exiting the neuron, which restores the membrane to its resting potential (repolarization). |
Subtopic: Origin of Resting Membrane Potential | Action Potential |
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What is a key difference between electrical and chemical synapses?
| 1. | Electrical synapses allow the direct flow of ions from one neuron to another, while chemical synapses involve the release of neurotransmitters. |
| 2. | Chemical synapses can transmit signals faster than electrical synapses. |
| 3. | Electrical synapses involve neurotransmitters, whereas chemical synapses do not. |
| 4. | Chemical synapses are found in the heart, while electrical synapses are found in the brain. |
Subtopic: Synapse |
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The key function of the cerebellum is to:
| 1. | Regulate heart rate and blood pressure. |
| 2. | Control voluntary movements and coordinate fine motor skills. |
| 3. | Control emotions and produce feelings. |
| 4. | Regulate body temperature and water balance. |
Subtopic: Hind & Mid Brain |
87%
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Consider the given two statements:
| Assertion (A): | Myelinated neurons transmit nerve impulses faster than unmyelinated neurons. |
| Reason (R): | Myelinated neurons form electrical synapse wile unmyelinated neurons form chemical synapse. |
| 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. |
Subtopic: Origin of Resting Membrane Potential | Action Potential |
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The sodium-potassium pump in neurons:
| 1. | Moves 3 Na+ ions out of the cell and 2 K+ ions into the cell against their concentration gradients. |
| 2. | Moves 2 Na+ ions into the cell and 3 K+ ions out of the cell using ATP. |
| 3. | Does not require ATP to function. |
| 4. | Is involved in the generation of the resting membrane potential. |
Subtopic: Origin of Resting Membrane Potential |
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Match the parts of the brain with their functions:
1. A-iii, B-i, C-ii
2. A-ii, B-iii, C-i
3. A-i, B-ii, C-iii
4. A-iii, B-ii, C-i
| Column I | Column II | ||
| A. | Cerebrum | i. | Coordination of movement and balance |
| B. | Cerebellum | ii. | Regulation of heart rate and breathing |
| C. | Medulla oblongata | iii. | Seat of intelligence, memory, and emotions |
1. A-iii, B-i, C-ii
2. A-ii, B-iii, C-i
3. A-i, B-ii, C-iii
4. A-iii, B-ii, C-i
Subtopic: Hind & Mid Brain | Fore Brain |
94%
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What is a key feature of a chemical synapse?
| 1. | Electrical signal directly passes from one neuron to another. |
| 2. | It primarily occurs in the heart. |
| 3. | It does not involve synaptic cleft. |
| 4. | It involves the release of neurotransmitters. |
Subtopic: Synapse |
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Which structure of the human brain will form a part of the diencephalon?
1. Cerebral cortex
2. Olfactory bulbs
3. Hypothalamus
4. Pons Varolii
1. Cerebral cortex
2. Olfactory bulbs
3. Hypothalamus
4. Pons Varolii
Subtopic: Diencephalon | Fore Brain |
72%
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Consider the given two statements:
| Assertion(A): | The nervous system is the master control system of the body, responsible for coordinating all its activities. |
| Reason(R): | The nervous system is divided into the central nervous system (CNS) and the peripheral nervous system (PNS). |
| 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. | (A) is False but (R) is True. |
Subtopic: Nervous System |
85%
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