284586
Assertion: Transmission of nerve impulse across a synapse is accomplished by neurotransmitters. Reason: Transmission across a synapse usually required neurotransmitter because there is a small space, i.e, synaptic cleft that separates one neuron from another.
1 If both (A) and (R) are true and the (R) is correct explanation of the (A).
2 If both (A) and (R) are true but the (R) is not correct explanation of the (A).
3 If the (A) is true but the (R) is false.
4 If both the \((A)\) and \((R)\) are false.
5 If (A) is false, but (R) is true.
Explanation:
A Neurotransmitters are chemicals that help transmit nerve impulses across a small gap called the synaptic cleft between neurons. This is necessary because the gap is too small for electrical impulses to cross directly. Neurotransmitters are released from one neuron and bind to receptor on another neuron, allowing the impulse to continue its functions. This process ensures smooth communication between neurons.
AIIMS-1999
Neural Control and Coordination
284596
Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction.
1 Calcium
2 Magnesium
3 Sodium
4 Potassium
Explanation:
A During muscle contraction neural signal reaching neuromuscular junction release acetylcholine (ach) which generate action potential in the sarcolemma and cause the release of \(\mathrm{Ca}^{+2}\) into sarcoplasm. Sarcoplasm Contents Calcium ion is responsible for unmasking of active site for myosin and for cross bridge activity during muscle contraction.
NEET-2016 Phase-II
Neural Control and Coordination
284597
Destruction of the anterior horn cells of the spinal cord would result in loss of :
1 Integrating impulses
2 Sensory impulses
3 Voluntary motor impulses
4 Commissural impulses
Explanation:
C Destruction of the anterior horn cells of the spinal cord would result in loss of voluntary motor impulse. The anterior horn contains cell bodies of alpha motor neurons, which affects to skeletal muscle movement. - The anterior grey column (anterior column), an anterior horn of spinal cord, motor horn or ventral horn is the front column of grey matter in the spinal cord. It is one of the three grey columns. - Anterior grey column contain motor neurons which affect skeletal muscles while posterior grey column receives information regarding touch and sensation.
AIPMT (Re-Exam)-2015
Neural Control and Coordination
284599
A diagram showing axon terminal and synapse is given below. Indentify correctly at least two of A-D.
B Diagram showing axon terminal and synapse. The part of a synapse is given below as per the diagram. A. It represent to receptors, these are proteins to which neurotransmitter bind. They can open ion channels and excite the postsynaptic neuron. B. It represent to synaptic cleft which is a gap between pre and post synaptic neuron. C. It represents the synaptic vesicles inside the axon terminals which contains the neurotransmitters. They attached to the presynaptic membrane and release the neurotransmitter in the synaptic cleft.
284586
Assertion: Transmission of nerve impulse across a synapse is accomplished by neurotransmitters. Reason: Transmission across a synapse usually required neurotransmitter because there is a small space, i.e, synaptic cleft that separates one neuron from another.
1 If both (A) and (R) are true and the (R) is correct explanation of the (A).
2 If both (A) and (R) are true but the (R) is not correct explanation of the (A).
3 If the (A) is true but the (R) is false.
4 If both the \((A)\) and \((R)\) are false.
5 If (A) is false, but (R) is true.
Explanation:
A Neurotransmitters are chemicals that help transmit nerve impulses across a small gap called the synaptic cleft between neurons. This is necessary because the gap is too small for electrical impulses to cross directly. Neurotransmitters are released from one neuron and bind to receptor on another neuron, allowing the impulse to continue its functions. This process ensures smooth communication between neurons.
AIIMS-1999
Neural Control and Coordination
284596
Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction.
1 Calcium
2 Magnesium
3 Sodium
4 Potassium
Explanation:
A During muscle contraction neural signal reaching neuromuscular junction release acetylcholine (ach) which generate action potential in the sarcolemma and cause the release of \(\mathrm{Ca}^{+2}\) into sarcoplasm. Sarcoplasm Contents Calcium ion is responsible for unmasking of active site for myosin and for cross bridge activity during muscle contraction.
NEET-2016 Phase-II
Neural Control and Coordination
284597
Destruction of the anterior horn cells of the spinal cord would result in loss of :
1 Integrating impulses
2 Sensory impulses
3 Voluntary motor impulses
4 Commissural impulses
Explanation:
C Destruction of the anterior horn cells of the spinal cord would result in loss of voluntary motor impulse. The anterior horn contains cell bodies of alpha motor neurons, which affects to skeletal muscle movement. - The anterior grey column (anterior column), an anterior horn of spinal cord, motor horn or ventral horn is the front column of grey matter in the spinal cord. It is one of the three grey columns. - Anterior grey column contain motor neurons which affect skeletal muscles while posterior grey column receives information regarding touch and sensation.
AIPMT (Re-Exam)-2015
Neural Control and Coordination
284599
A diagram showing axon terminal and synapse is given below. Indentify correctly at least two of A-D.
B Diagram showing axon terminal and synapse. The part of a synapse is given below as per the diagram. A. It represent to receptors, these are proteins to which neurotransmitter bind. They can open ion channels and excite the postsynaptic neuron. B. It represent to synaptic cleft which is a gap between pre and post synaptic neuron. C. It represents the synaptic vesicles inside the axon terminals which contains the neurotransmitters. They attached to the presynaptic membrane and release the neurotransmitter in the synaptic cleft.
284586
Assertion: Transmission of nerve impulse across a synapse is accomplished by neurotransmitters. Reason: Transmission across a synapse usually required neurotransmitter because there is a small space, i.e, synaptic cleft that separates one neuron from another.
1 If both (A) and (R) are true and the (R) is correct explanation of the (A).
2 If both (A) and (R) are true but the (R) is not correct explanation of the (A).
3 If the (A) is true but the (R) is false.
4 If both the \((A)\) and \((R)\) are false.
5 If (A) is false, but (R) is true.
Explanation:
A Neurotransmitters are chemicals that help transmit nerve impulses across a small gap called the synaptic cleft between neurons. This is necessary because the gap is too small for electrical impulses to cross directly. Neurotransmitters are released from one neuron and bind to receptor on another neuron, allowing the impulse to continue its functions. This process ensures smooth communication between neurons.
AIIMS-1999
Neural Control and Coordination
284596
Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction.
1 Calcium
2 Magnesium
3 Sodium
4 Potassium
Explanation:
A During muscle contraction neural signal reaching neuromuscular junction release acetylcholine (ach) which generate action potential in the sarcolemma and cause the release of \(\mathrm{Ca}^{+2}\) into sarcoplasm. Sarcoplasm Contents Calcium ion is responsible for unmasking of active site for myosin and for cross bridge activity during muscle contraction.
NEET-2016 Phase-II
Neural Control and Coordination
284597
Destruction of the anterior horn cells of the spinal cord would result in loss of :
1 Integrating impulses
2 Sensory impulses
3 Voluntary motor impulses
4 Commissural impulses
Explanation:
C Destruction of the anterior horn cells of the spinal cord would result in loss of voluntary motor impulse. The anterior horn contains cell bodies of alpha motor neurons, which affects to skeletal muscle movement. - The anterior grey column (anterior column), an anterior horn of spinal cord, motor horn or ventral horn is the front column of grey matter in the spinal cord. It is one of the three grey columns. - Anterior grey column contain motor neurons which affect skeletal muscles while posterior grey column receives information regarding touch and sensation.
AIPMT (Re-Exam)-2015
Neural Control and Coordination
284599
A diagram showing axon terminal and synapse is given below. Indentify correctly at least two of A-D.
B Diagram showing axon terminal and synapse. The part of a synapse is given below as per the diagram. A. It represent to receptors, these are proteins to which neurotransmitter bind. They can open ion channels and excite the postsynaptic neuron. B. It represent to synaptic cleft which is a gap between pre and post synaptic neuron. C. It represents the synaptic vesicles inside the axon terminals which contains the neurotransmitters. They attached to the presynaptic membrane and release the neurotransmitter in the synaptic cleft.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
Neural Control and Coordination
284586
Assertion: Transmission of nerve impulse across a synapse is accomplished by neurotransmitters. Reason: Transmission across a synapse usually required neurotransmitter because there is a small space, i.e, synaptic cleft that separates one neuron from another.
1 If both (A) and (R) are true and the (R) is correct explanation of the (A).
2 If both (A) and (R) are true but the (R) is not correct explanation of the (A).
3 If the (A) is true but the (R) is false.
4 If both the \((A)\) and \((R)\) are false.
5 If (A) is false, but (R) is true.
Explanation:
A Neurotransmitters are chemicals that help transmit nerve impulses across a small gap called the synaptic cleft between neurons. This is necessary because the gap is too small for electrical impulses to cross directly. Neurotransmitters are released from one neuron and bind to receptor on another neuron, allowing the impulse to continue its functions. This process ensures smooth communication between neurons.
AIIMS-1999
Neural Control and Coordination
284596
Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction.
1 Calcium
2 Magnesium
3 Sodium
4 Potassium
Explanation:
A During muscle contraction neural signal reaching neuromuscular junction release acetylcholine (ach) which generate action potential in the sarcolemma and cause the release of \(\mathrm{Ca}^{+2}\) into sarcoplasm. Sarcoplasm Contents Calcium ion is responsible for unmasking of active site for myosin and for cross bridge activity during muscle contraction.
NEET-2016 Phase-II
Neural Control and Coordination
284597
Destruction of the anterior horn cells of the spinal cord would result in loss of :
1 Integrating impulses
2 Sensory impulses
3 Voluntary motor impulses
4 Commissural impulses
Explanation:
C Destruction of the anterior horn cells of the spinal cord would result in loss of voluntary motor impulse. The anterior horn contains cell bodies of alpha motor neurons, which affects to skeletal muscle movement. - The anterior grey column (anterior column), an anterior horn of spinal cord, motor horn or ventral horn is the front column of grey matter in the spinal cord. It is one of the three grey columns. - Anterior grey column contain motor neurons which affect skeletal muscles while posterior grey column receives information regarding touch and sensation.
AIPMT (Re-Exam)-2015
Neural Control and Coordination
284599
A diagram showing axon terminal and synapse is given below. Indentify correctly at least two of A-D.
B Diagram showing axon terminal and synapse. The part of a synapse is given below as per the diagram. A. It represent to receptors, these are proteins to which neurotransmitter bind. They can open ion channels and excite the postsynaptic neuron. B. It represent to synaptic cleft which is a gap between pre and post synaptic neuron. C. It represents the synaptic vesicles inside the axon terminals which contains the neurotransmitters. They attached to the presynaptic membrane and release the neurotransmitter in the synaptic cleft.
