Select Chapter Topics:
Q. No.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%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Nodes of Ranvier are best described as:
1. Synaptic knobs at axonal endings
2. Gaps in myelin sheath
3. The broad part of cell body from where axon arises
4. Points of electrical synapses
1. Synaptic knobs at axonal endings
2. Gaps in myelin sheath
3. The broad part of cell body from where axon arises
4. Points of electrical synapses
Subtopic: Neuroanatomy |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Nodes of Ranvier primarily function in:
| 1. | Enhancing neuronal metabolism |
| 2. | Stopping progress of nerve impulse |
| 3. | Speeding up transmission of nerve impulse by saltatory condition |
| 4. | Preventing neuronal damage |
Subtopic: Neuroanatomy |
Please attempt this question first.
Hints
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 |
91%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
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%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
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 |
87%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
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 |
66%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
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%
Please attempt this question first.
Hints
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 |
97%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
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 |
86%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Select Chapter Topics:
© 2024 GoodEd Technologies Pvt. Ltd.