340621
Medullated nerve fibres are found in the nerves of
1 Cranial region only
2 Spinal; cranial region
3 Spinal; internal organs
4 Spinal region only
Explanation:
Myelinated/medullated, nerve fibres are covered by myelin sheath and these fibres are found in cranial and spinal region. Due to the presence of myelin sheath, the transmission of nerve impulse occur faster as compared to non-myelinated fibres.
BIOXI21: NEURAL CONTROL AND COORDINATION
340622
Assertion : Myelin sheath insulates nerve fibre and prevents its depolarisation. Reason : Nerve impulses are conducted more rapidly in non-myelinated fibres than myelinated ones.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Myelin acts as an insulator that prevents current from leaving the axon, increasing the speed of action potential conduction. By insulating the axon for particular lengths and then having nodes for ion exchange, the myelin sheath increases the speed of transmission of an impulse. Thus, both Assertion and Reason are false.
BIOXI21: NEURAL CONTROL AND COORDINATION
340623
Synaptic vesicles contains chemicals called ____ and is present in ____
1 Synaptic fluid, axon
2 Neurotrasmitters, cyton
3 Neurotrasmitters, axon
4 Neurotrasmitters, neuron
Explanation:
Each branch of the axon terminates as a bulb-like structure called synaptic knob which possess synaptic vesicles containing chemicals called neurotransmitters
BIOXI21: NEURAL CONTROL AND COORDINATION
340624
Statement A : Short fibres which branch repeatedly and project out of the cell body also contain Nissl’s granules and called dendrites. Statement B : Axon is a long fibre, the distal end of which is branched.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
340621
Medullated nerve fibres are found in the nerves of
1 Cranial region only
2 Spinal; cranial region
3 Spinal; internal organs
4 Spinal region only
Explanation:
Myelinated/medullated, nerve fibres are covered by myelin sheath and these fibres are found in cranial and spinal region. Due to the presence of myelin sheath, the transmission of nerve impulse occur faster as compared to non-myelinated fibres.
BIOXI21: NEURAL CONTROL AND COORDINATION
340622
Assertion : Myelin sheath insulates nerve fibre and prevents its depolarisation. Reason : Nerve impulses are conducted more rapidly in non-myelinated fibres than myelinated ones.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Myelin acts as an insulator that prevents current from leaving the axon, increasing the speed of action potential conduction. By insulating the axon for particular lengths and then having nodes for ion exchange, the myelin sheath increases the speed of transmission of an impulse. Thus, both Assertion and Reason are false.
BIOXI21: NEURAL CONTROL AND COORDINATION
340623
Synaptic vesicles contains chemicals called ____ and is present in ____
1 Synaptic fluid, axon
2 Neurotrasmitters, cyton
3 Neurotrasmitters, axon
4 Neurotrasmitters, neuron
Explanation:
Each branch of the axon terminates as a bulb-like structure called synaptic knob which possess synaptic vesicles containing chemicals called neurotransmitters
BIOXI21: NEURAL CONTROL AND COORDINATION
340624
Statement A : Short fibres which branch repeatedly and project out of the cell body also contain Nissl’s granules and called dendrites. Statement B : Axon is a long fibre, the distal end of which is branched.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
340621
Medullated nerve fibres are found in the nerves of
1 Cranial region only
2 Spinal; cranial region
3 Spinal; internal organs
4 Spinal region only
Explanation:
Myelinated/medullated, nerve fibres are covered by myelin sheath and these fibres are found in cranial and spinal region. Due to the presence of myelin sheath, the transmission of nerve impulse occur faster as compared to non-myelinated fibres.
BIOXI21: NEURAL CONTROL AND COORDINATION
340622
Assertion : Myelin sheath insulates nerve fibre and prevents its depolarisation. Reason : Nerve impulses are conducted more rapidly in non-myelinated fibres than myelinated ones.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Myelin acts as an insulator that prevents current from leaving the axon, increasing the speed of action potential conduction. By insulating the axon for particular lengths and then having nodes for ion exchange, the myelin sheath increases the speed of transmission of an impulse. Thus, both Assertion and Reason are false.
BIOXI21: NEURAL CONTROL AND COORDINATION
340623
Synaptic vesicles contains chemicals called ____ and is present in ____
1 Synaptic fluid, axon
2 Neurotrasmitters, cyton
3 Neurotrasmitters, axon
4 Neurotrasmitters, neuron
Explanation:
Each branch of the axon terminates as a bulb-like structure called synaptic knob which possess synaptic vesicles containing chemicals called neurotransmitters
BIOXI21: NEURAL CONTROL AND COORDINATION
340624
Statement A : Short fibres which branch repeatedly and project out of the cell body also contain Nissl’s granules and called dendrites. Statement B : Axon is a long fibre, the distal end of which is branched.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
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BIOXI21: NEURAL CONTROL AND COORDINATION
340621
Medullated nerve fibres are found in the nerves of
1 Cranial region only
2 Spinal; cranial region
3 Spinal; internal organs
4 Spinal region only
Explanation:
Myelinated/medullated, nerve fibres are covered by myelin sheath and these fibres are found in cranial and spinal region. Due to the presence of myelin sheath, the transmission of nerve impulse occur faster as compared to non-myelinated fibres.
BIOXI21: NEURAL CONTROL AND COORDINATION
340622
Assertion : Myelin sheath insulates nerve fibre and prevents its depolarisation. Reason : Nerve impulses are conducted more rapidly in non-myelinated fibres than myelinated ones.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Myelin acts as an insulator that prevents current from leaving the axon, increasing the speed of action potential conduction. By insulating the axon for particular lengths and then having nodes for ion exchange, the myelin sheath increases the speed of transmission of an impulse. Thus, both Assertion and Reason are false.
BIOXI21: NEURAL CONTROL AND COORDINATION
340623
Synaptic vesicles contains chemicals called ____ and is present in ____
1 Synaptic fluid, axon
2 Neurotrasmitters, cyton
3 Neurotrasmitters, axon
4 Neurotrasmitters, neuron
Explanation:
Each branch of the axon terminates as a bulb-like structure called synaptic knob which possess synaptic vesicles containing chemicals called neurotransmitters
BIOXI21: NEURAL CONTROL AND COORDINATION
340624
Statement A : Short fibres which branch repeatedly and project out of the cell body also contain Nissl’s granules and called dendrites. Statement B : Axon is a long fibre, the distal end of which is branched.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
340621
Medullated nerve fibres are found in the nerves of
1 Cranial region only
2 Spinal; cranial region
3 Spinal; internal organs
4 Spinal region only
Explanation:
Myelinated/medullated, nerve fibres are covered by myelin sheath and these fibres are found in cranial and spinal region. Due to the presence of myelin sheath, the transmission of nerve impulse occur faster as compared to non-myelinated fibres.
BIOXI21: NEURAL CONTROL AND COORDINATION
340622
Assertion : Myelin sheath insulates nerve fibre and prevents its depolarisation. Reason : Nerve impulses are conducted more rapidly in non-myelinated fibres than myelinated ones.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Myelin acts as an insulator that prevents current from leaving the axon, increasing the speed of action potential conduction. By insulating the axon for particular lengths and then having nodes for ion exchange, the myelin sheath increases the speed of transmission of an impulse. Thus, both Assertion and Reason are false.
BIOXI21: NEURAL CONTROL AND COORDINATION
340623
Synaptic vesicles contains chemicals called ____ and is present in ____
1 Synaptic fluid, axon
2 Neurotrasmitters, cyton
3 Neurotrasmitters, axon
4 Neurotrasmitters, neuron
Explanation:
Each branch of the axon terminates as a bulb-like structure called synaptic knob which possess synaptic vesicles containing chemicals called neurotransmitters
BIOXI21: NEURAL CONTROL AND COORDINATION
340624
Statement A : Short fibres which branch repeatedly and project out of the cell body also contain Nissl’s granules and called dendrites. Statement B : Axon is a long fibre, the distal end of which is branched.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.