286549
During the propagation of a nerve impulse, the action potential results from the movement of
1 $\text{N}{{\text{a}}^{+}}$ions from extracellular fluid to intracellular fluid.
2 ${{\text{K}}^{+}}$ions from extracellular fluid to intracellular fluid.
3 $\text{N}{{\text{a}}^{+}}$ions from intracellular fluid to extracellular fluid.
4 ${{\text{K}}^{+}}$ions from intracellular fluid to extracellular fluid.
Explanation:
(a) Action potentials are formed when a stimulus causes the cell membrane to depolarize the threshold of excitation, causing all sodium ion channels to open. During the propagation of a nerve impulse, the action potential results from the movement of $\text{N}{{\text{a}}^{+}}$ions from the extracellular fluid to intracellular fluid.
NCERT Page-317 / N-232
Neural Control and Coordination(NCERT)
286550
The junction between the axon of one neuron and the dendrite of the next is called
1 junction point
2 a synapse
3 a joint
4 constant bridge
Explanation:
(b) The end-to-end position of the axon of one neuron and the dendrites of another neuron called the synapse.
NCERT Page-319 / N-234
Neural Control and Coordination(NCERT)
286551
Which of the following options correctly represents the name of $1,2,3$ and 4 is the given diagram of neuron?
1 1-Axon, 2-Dendrites, 3-Node of Ranvier, 4-Myelin sheath
2 1-Dendrites, 2-Axon, 3-Node of Ranvier, 4-Myelin sheath
3 1-Dendrites, 2-Cell body, 3-Myelin sheath, 4-Node of Ranvier
4 1-Axon, 2-Cell body, 3-Dendrites, 4-Node of Ranvier
Explanation:
(c) In the given diagram of neuron, the part marked as I, II, III and IV are respectively dendrites, cell body, myelin sheath and nodes of Ranvier. Neuron is a specialized, impulse-conducting cell that is the functional unit of
the nervous system, consisting of the cell body and its processes, the axon and dendrites.
NCERT Page-317 / N-232
Neural Control and Coordination(NCERT)
286552
How does pre-synaptic neuron transmits an impulse (action potential) across the synaptic cleft to postsynaptic neuron?
1 Through electrical impulse
2 Through chemical impulse
3 Through neurotransmitters
4 None of the above
Explanation:
(c) Through neurotransmitters pre-synaptic neuron transmits an impulse (action potential) across the synaptic cleft to post-synaptic neuron.
NCERT Page-319/ N-234
Neural Control and Coordination(NCERT)
286553
Electrical current can flow directly from one neuron into other across the synapses. Which of the following statements is/are correct?
1 Impulse transmission across an electrical synapse is always faster than chemical synapse.
2 Chemical synapse is faster from electrical synapse.
3 Electrical synapse are rare in our system.
4 Both (a) and (c)
Explanation:
(d) Statement (a) and (c) are the correct. So option (d) is correct.
286549
During the propagation of a nerve impulse, the action potential results from the movement of
1 $\text{N}{{\text{a}}^{+}}$ions from extracellular fluid to intracellular fluid.
2 ${{\text{K}}^{+}}$ions from extracellular fluid to intracellular fluid.
3 $\text{N}{{\text{a}}^{+}}$ions from intracellular fluid to extracellular fluid.
4 ${{\text{K}}^{+}}$ions from intracellular fluid to extracellular fluid.
Explanation:
(a) Action potentials are formed when a stimulus causes the cell membrane to depolarize the threshold of excitation, causing all sodium ion channels to open. During the propagation of a nerve impulse, the action potential results from the movement of $\text{N}{{\text{a}}^{+}}$ions from the extracellular fluid to intracellular fluid.
NCERT Page-317 / N-232
Neural Control and Coordination(NCERT)
286550
The junction between the axon of one neuron and the dendrite of the next is called
1 junction point
2 a synapse
3 a joint
4 constant bridge
Explanation:
(b) The end-to-end position of the axon of one neuron and the dendrites of another neuron called the synapse.
NCERT Page-319 / N-234
Neural Control and Coordination(NCERT)
286551
Which of the following options correctly represents the name of $1,2,3$ and 4 is the given diagram of neuron?
1 1-Axon, 2-Dendrites, 3-Node of Ranvier, 4-Myelin sheath
2 1-Dendrites, 2-Axon, 3-Node of Ranvier, 4-Myelin sheath
3 1-Dendrites, 2-Cell body, 3-Myelin sheath, 4-Node of Ranvier
4 1-Axon, 2-Cell body, 3-Dendrites, 4-Node of Ranvier
Explanation:
(c) In the given diagram of neuron, the part marked as I, II, III and IV are respectively dendrites, cell body, myelin sheath and nodes of Ranvier. Neuron is a specialized, impulse-conducting cell that is the functional unit of
the nervous system, consisting of the cell body and its processes, the axon and dendrites.
NCERT Page-317 / N-232
Neural Control and Coordination(NCERT)
286552
How does pre-synaptic neuron transmits an impulse (action potential) across the synaptic cleft to postsynaptic neuron?
1 Through electrical impulse
2 Through chemical impulse
3 Through neurotransmitters
4 None of the above
Explanation:
(c) Through neurotransmitters pre-synaptic neuron transmits an impulse (action potential) across the synaptic cleft to post-synaptic neuron.
NCERT Page-319/ N-234
Neural Control and Coordination(NCERT)
286553
Electrical current can flow directly from one neuron into other across the synapses. Which of the following statements is/are correct?
1 Impulse transmission across an electrical synapse is always faster than chemical synapse.
2 Chemical synapse is faster from electrical synapse.
3 Electrical synapse are rare in our system.
4 Both (a) and (c)
Explanation:
(d) Statement (a) and (c) are the correct. So option (d) is correct.
286549
During the propagation of a nerve impulse, the action potential results from the movement of
1 $\text{N}{{\text{a}}^{+}}$ions from extracellular fluid to intracellular fluid.
2 ${{\text{K}}^{+}}$ions from extracellular fluid to intracellular fluid.
3 $\text{N}{{\text{a}}^{+}}$ions from intracellular fluid to extracellular fluid.
4 ${{\text{K}}^{+}}$ions from intracellular fluid to extracellular fluid.
Explanation:
(a) Action potentials are formed when a stimulus causes the cell membrane to depolarize the threshold of excitation, causing all sodium ion channels to open. During the propagation of a nerve impulse, the action potential results from the movement of $\text{N}{{\text{a}}^{+}}$ions from the extracellular fluid to intracellular fluid.
NCERT Page-317 / N-232
Neural Control and Coordination(NCERT)
286550
The junction between the axon of one neuron and the dendrite of the next is called
1 junction point
2 a synapse
3 a joint
4 constant bridge
Explanation:
(b) The end-to-end position of the axon of one neuron and the dendrites of another neuron called the synapse.
NCERT Page-319 / N-234
Neural Control and Coordination(NCERT)
286551
Which of the following options correctly represents the name of $1,2,3$ and 4 is the given diagram of neuron?
1 1-Axon, 2-Dendrites, 3-Node of Ranvier, 4-Myelin sheath
2 1-Dendrites, 2-Axon, 3-Node of Ranvier, 4-Myelin sheath
3 1-Dendrites, 2-Cell body, 3-Myelin sheath, 4-Node of Ranvier
4 1-Axon, 2-Cell body, 3-Dendrites, 4-Node of Ranvier
Explanation:
(c) In the given diagram of neuron, the part marked as I, II, III and IV are respectively dendrites, cell body, myelin sheath and nodes of Ranvier. Neuron is a specialized, impulse-conducting cell that is the functional unit of
the nervous system, consisting of the cell body and its processes, the axon and dendrites.
NCERT Page-317 / N-232
Neural Control and Coordination(NCERT)
286552
How does pre-synaptic neuron transmits an impulse (action potential) across the synaptic cleft to postsynaptic neuron?
1 Through electrical impulse
2 Through chemical impulse
3 Through neurotransmitters
4 None of the above
Explanation:
(c) Through neurotransmitters pre-synaptic neuron transmits an impulse (action potential) across the synaptic cleft to post-synaptic neuron.
NCERT Page-319/ N-234
Neural Control and Coordination(NCERT)
286553
Electrical current can flow directly from one neuron into other across the synapses. Which of the following statements is/are correct?
1 Impulse transmission across an electrical synapse is always faster than chemical synapse.
2 Chemical synapse is faster from electrical synapse.
3 Electrical synapse are rare in our system.
4 Both (a) and (c)
Explanation:
(d) Statement (a) and (c) are the correct. So option (d) is correct.
286549
During the propagation of a nerve impulse, the action potential results from the movement of
1 $\text{N}{{\text{a}}^{+}}$ions from extracellular fluid to intracellular fluid.
2 ${{\text{K}}^{+}}$ions from extracellular fluid to intracellular fluid.
3 $\text{N}{{\text{a}}^{+}}$ions from intracellular fluid to extracellular fluid.
4 ${{\text{K}}^{+}}$ions from intracellular fluid to extracellular fluid.
Explanation:
(a) Action potentials are formed when a stimulus causes the cell membrane to depolarize the threshold of excitation, causing all sodium ion channels to open. During the propagation of a nerve impulse, the action potential results from the movement of $\text{N}{{\text{a}}^{+}}$ions from the extracellular fluid to intracellular fluid.
NCERT Page-317 / N-232
Neural Control and Coordination(NCERT)
286550
The junction between the axon of one neuron and the dendrite of the next is called
1 junction point
2 a synapse
3 a joint
4 constant bridge
Explanation:
(b) The end-to-end position of the axon of one neuron and the dendrites of another neuron called the synapse.
NCERT Page-319 / N-234
Neural Control and Coordination(NCERT)
286551
Which of the following options correctly represents the name of $1,2,3$ and 4 is the given diagram of neuron?
1 1-Axon, 2-Dendrites, 3-Node of Ranvier, 4-Myelin sheath
2 1-Dendrites, 2-Axon, 3-Node of Ranvier, 4-Myelin sheath
3 1-Dendrites, 2-Cell body, 3-Myelin sheath, 4-Node of Ranvier
4 1-Axon, 2-Cell body, 3-Dendrites, 4-Node of Ranvier
Explanation:
(c) In the given diagram of neuron, the part marked as I, II, III and IV are respectively dendrites, cell body, myelin sheath and nodes of Ranvier. Neuron is a specialized, impulse-conducting cell that is the functional unit of
the nervous system, consisting of the cell body and its processes, the axon and dendrites.
NCERT Page-317 / N-232
Neural Control and Coordination(NCERT)
286552
How does pre-synaptic neuron transmits an impulse (action potential) across the synaptic cleft to postsynaptic neuron?
1 Through electrical impulse
2 Through chemical impulse
3 Through neurotransmitters
4 None of the above
Explanation:
(c) Through neurotransmitters pre-synaptic neuron transmits an impulse (action potential) across the synaptic cleft to post-synaptic neuron.
NCERT Page-319/ N-234
Neural Control and Coordination(NCERT)
286553
Electrical current can flow directly from one neuron into other across the synapses. Which of the following statements is/are correct?
1 Impulse transmission across an electrical synapse is always faster than chemical synapse.
2 Chemical synapse is faster from electrical synapse.
3 Electrical synapse are rare in our system.
4 Both (a) and (c)
Explanation:
(d) Statement (a) and (c) are the correct. So option (d) is correct.
286549
During the propagation of a nerve impulse, the action potential results from the movement of
1 $\text{N}{{\text{a}}^{+}}$ions from extracellular fluid to intracellular fluid.
2 ${{\text{K}}^{+}}$ions from extracellular fluid to intracellular fluid.
3 $\text{N}{{\text{a}}^{+}}$ions from intracellular fluid to extracellular fluid.
4 ${{\text{K}}^{+}}$ions from intracellular fluid to extracellular fluid.
Explanation:
(a) Action potentials are formed when a stimulus causes the cell membrane to depolarize the threshold of excitation, causing all sodium ion channels to open. During the propagation of a nerve impulse, the action potential results from the movement of $\text{N}{{\text{a}}^{+}}$ions from the extracellular fluid to intracellular fluid.
NCERT Page-317 / N-232
Neural Control and Coordination(NCERT)
286550
The junction between the axon of one neuron and the dendrite of the next is called
1 junction point
2 a synapse
3 a joint
4 constant bridge
Explanation:
(b) The end-to-end position of the axon of one neuron and the dendrites of another neuron called the synapse.
NCERT Page-319 / N-234
Neural Control and Coordination(NCERT)
286551
Which of the following options correctly represents the name of $1,2,3$ and 4 is the given diagram of neuron?
1 1-Axon, 2-Dendrites, 3-Node of Ranvier, 4-Myelin sheath
2 1-Dendrites, 2-Axon, 3-Node of Ranvier, 4-Myelin sheath
3 1-Dendrites, 2-Cell body, 3-Myelin sheath, 4-Node of Ranvier
4 1-Axon, 2-Cell body, 3-Dendrites, 4-Node of Ranvier
Explanation:
(c) In the given diagram of neuron, the part marked as I, II, III and IV are respectively dendrites, cell body, myelin sheath and nodes of Ranvier. Neuron is a specialized, impulse-conducting cell that is the functional unit of
the nervous system, consisting of the cell body and its processes, the axon and dendrites.
NCERT Page-317 / N-232
Neural Control and Coordination(NCERT)
286552
How does pre-synaptic neuron transmits an impulse (action potential) across the synaptic cleft to postsynaptic neuron?
1 Through electrical impulse
2 Through chemical impulse
3 Through neurotransmitters
4 None of the above
Explanation:
(c) Through neurotransmitters pre-synaptic neuron transmits an impulse (action potential) across the synaptic cleft to post-synaptic neuron.
NCERT Page-319/ N-234
Neural Control and Coordination(NCERT)
286553
Electrical current can flow directly from one neuron into other across the synapses. Which of the following statements is/are correct?
1 Impulse transmission across an electrical synapse is always faster than chemical synapse.
2 Chemical synapse is faster from electrical synapse.
3 Electrical synapse are rare in our system.
4 Both (a) and (c)
Explanation:
(d) Statement (a) and (c) are the correct. So option (d) is correct.
