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23 September, 23:50

A toxin selectively kills astrocytes. How would their loss affect functions of the nervous system?

a. loss of autonomic control of blood pressure and heart rate

b. loss of the blood-brain barrier

c. loss of all sensory function

d. no formation of cerebrospinal fluid

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  1. 24 September, 00:05
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    The correct option is 'd': Loss of blood brain barrier.

    Explanation:

    Astrocytes are star shaped cells in the brain and the spinal chord and are estimated to be about 20-30% of the tissue gila.

    The functions of astrocytes are as follows:

    1) Maintenance of blood brain barrier.

    2) Provision of nutrients to brain tissue.

    3) maintain the extracellular ion balance.

    4) Regulate neuronal signalling.

    thus among all the options the correct answer is option B.
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