BRAIN
VENTRICLES CSF
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Blood-CSF barrier
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Arachnoid granulations
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Presence of one way valves
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Blood-brain barrier
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Detailed explanation-1: -Therefore, “blood-brain barrier” controls the substances in CSF. Hence, the correct answer is option .
Detailed explanation-2: -The composition of the CSF when it enters the subarachnoid space may be modified by the arachnoid membrane. This tissue is part of the blood-CSF barrier and, like the choroid plexus and the cerebral capillaries, may not be a purely passive barrier but capable of actively modifying CSF composition.
Detailed explanation-3: -Receptor-mediated transport allows glucose, ions, and other special molecules to cross the blood-brain barrier. Most large molecules and proteins are precluded from entering the barrier.
Detailed explanation-4: -CSF Production The blood plasma freely permeates through the capillary loops. However, a barrier exists at the ependymal cells as they are connected by tight junctions. Hence, the ependymal cells form the blood–cerebral spinal fluid barrier, regulating the composition of CSF.