This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'All are true about neurotrophins except ? \nSelect and explain. \nA. Help integrity of postsynaptic neurons, B. TrK B is associated with brain derived neurotrophic factor, C. Helps in growth of cholinergic neurons in basal forebrain, D. Always transpoed antegrade along the axon', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Always transpoed antegrade along the axon NeurotrophinsThis name is given to a group of proteins necessary for the survival and growth of neurons.Some of them are synthesized by extraneuronal structures innervated by the neurons, e.g. skeletal muscle innervated by alpha-motor neurons and tissue innervated by autonomic neurons.Many are produced by astrocytes.From the non-neural tissues, neurotrophins are taken up by endocytosis at the nerve terminal and transpoed to the soma by axonal retrograde transpo mechanism.", 'role': 'assistant'}]