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Q. No.The nerve fibres that transmit impulses from tissues to the CNS are called _________, while those that transmit impulses from the CNS to peripheral tissues are called _________.
1.
efferent fibres, afferent fibres
2.
afferent fibres, efferent fibres
3.
somatic fibres, autonomic fibres
4.
sensory fibres, sympathetic fibres
Subtopic: Nervous System |
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Which type of neuron, with one axon and one dendrite, is primarily found in the retina of the eye?
1. Unipolar
2. Multipolar
3. Bipolar
4. Quadripolar
1. Unipolar
2. Multipolar
3. Bipolar
4. Quadripolar
Subtopic: Nervous System |
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Level 1: 80%+
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The unique characteristic of an electrical synapse, making it distinct from a chemical synapse, is that:
| 1. | It requires neurotransmitters to transmit impulses between neurons. |
| 2. | It uses synaptic vesicles to transmit impulses between neurons. |
| 3. | It occurs predominantly in the autonomic neural system. |
| 4. | It allows direct current flow between neurons with only a virtual synaptic cleft, resulting in faster impulse transmission. |
Subtopic: Origin of Resting Membrane Potential | Action Potential | Synapse |
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In the human brain, the primary role of the hypothalamus includes:
| 1. | Coordinating voluntary muscle movements and balance |
| 2. | Managing emotions such as fear and excitement via the corpus callosum |
| 3. | Regulating body temperature, hunger, thirst, and hormonal release through neurosecretory cells |
| 4. | Connecting the cerebrum and spinal cord for sensory integration |
Subtopic: Fore Brain |
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Which of the following structures is not a part of the central nervous system?
1. a parasympathetic effector
2. the medulla
3. the hypothalamus
4. the cerebral cortex
1. a parasympathetic effector
2. the medulla
3. the hypothalamus
4. the cerebral cortex
Subtopic: Fore Brain | Central neural system |
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Match the parts of the brain in Column-I with their functions in Column-II:
Options:
1. A-Q, B-R, C-P, D-S
2. A-S, B-Q, C-R, D-P
3. A-P, B-S, C-R, D-Q
4. A-Q, B-S, C-P, D-R
| Column-I (Brain Part) |
Column-II (Function) | ||
| A. | Cerebellum | P. | Regulation of temperature and thirst |
| B. | Medulla Oblongata | Q. | Coordination of voluntary movements |
| C. | Hypothalamus | R. | Reflex control of heart rate |
| D. | Cerebrum | S. | Center for higher cognitive functions |
1. A-Q, B-R, C-P, D-S
2. A-S, B-Q, C-R, D-P
3. A-P, B-S, C-R, D-Q
4. A-Q, B-S, C-P, D-R
Subtopic: Hind & Mid Brain |
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Match the types of neurons in Column-I with their functions in Column-II:
Options:
1. A-Q, B-P, C-S, D-R
2. A-S, B-Q, C-P, D-R
3. A-P, B-R, C-Q, D-S
4. A-R, B-Q, C-P, D-S
| Column-I (Neuron Type) |
Column-II (Function) | ||
| A. | Sensory Neuron | P. | Embryonic stages |
| B. | Motor Neuron | Q. | Carries impulses to muscles or glands |
| C. | Unipolar neuron | R. | Detects and transmits sensory stimuli |
| D. | Bipolar neuron | S. | Human retina |
1. A-Q, B-P, C-S, D-R
2. A-S, B-Q, C-P, D-R
3. A-P, B-R, C-Q, D-S
4. A-R, B-Q, C-P, D-S
Subtopic: Nervous System |
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Regarding the formation of resting membrane potential in a neuron:
| 1. | The resting potential is established by the passive diffusion of Na⁺ and K⁺ ions across the axonal membrane, without the involvement of active transport. |
| 2. | The sodium-potassium pump actively transports 3 Na⁺ ions out of the neuron for every 2 K⁺ ions into the neuron, creating a polarized state with a positively charged exterior and a negatively charged interior. |
| 3. | The resting membrane potential is due to equal distribution of Na⁺ and K⁺ ions across the membrane, resulting in no potential difference. |
| 4. | The inner surface of the axonal membrane is positively charged due to an excess of Na⁺ ions inside the neuron. |
Subtopic: Origin of Resting Membrane Potential |
85%
Level 1: 80%+
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Which of the following occurs when a neuron generates an action potential?
| 1. | Potassium ions move into the cell and sodium ions move out. |
| 2. | The outer surface of the membrane becomes positively charged. |
| 3. | Sodium channels close, and potassium channels open. |
| 4. | The polarity at the site of stimulation is reversed, with the inside becoming positively charged. |
Subtopic: Action Potential |
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Level 2: 60%+
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The limbic system in the human brain is associated with:
1. Coordination of movements
2. Regulation of emotions and memory
3. Reflex actions
4. Language processing
1. Coordination of movements
2. Regulation of emotions and memory
3. Reflex actions
4. Language processing
Subtopic: Fore Brain |
87%
Level 1: 80%+
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