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Neurotransmitters are present in
Neurotransmitters are present in
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Solution
The correct option is B Synaptic knobs
A synaptic knob is small button-like structure present at the end of the axonal branch at synapse and serves to store the neurotransmitters which are released in synaptic cleft. Thus, option B is correct. Option A is incorrect as Schwann/Schwarm cells of peripheral nervous system form the myelin sheath around the myelinated fibers. Dendrites are the small extension of nerve cells that receive signals from sensory receptors or other neurons and brings them towards the cell body. Thus, option C is incorrect. Nerve fibers which are covered with myelin sheath are called as myelinated/medullated fibers while those without it are called as non-medullated fibers. Since myelin sheath is made up of lipids, the water-soluble ions which carry the current across the membrane cannot permeate through the membrane; there is no leakage of current. Hence, the correct answer is B.
A synaptic knob is small button-like structure present at the end of the axonal branch at synapse and serves to store the neurotransmitters which are released in synaptic cleft. Thus, option B is correct. Option A is incorrect as Schwann/Schwarm cells of peripheral nervous system form the myelin sheath around the myelinated fibers. Dendrites are the small extension of nerve cells that receive signals from sensory receptors or other neurons and brings them towards the cell body. Thus, option C is incorrect. Nerve fibers which are covered with myelin sheath are called as myelinated/medullated fibers while those without it are called as non-medullated fibers. Since myelin sheath is made up of lipids, the water-soluble ions which carry the current across the membrane cannot permeate through the membrane; there is no leakage of current. Hence, the correct answer is B.
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