PHYSIOLOGY
CENTRAL NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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lumbar
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sacral
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thoracic
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cervical
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Detailed explanation-1: -The answer is (c); choroid plexus. The choroid plexus is a network of cells found in the central nervous system that aids in the production of cerebrospinal fluid (commonly known as CSF). The cervical, brachial, lumbar, and sacral plexuses are all networks of mixed spinal nerves.
Detailed explanation-2: -The intercostal nerves are distributed chiefly to the parietes of the thorax and abdomen, and differ from the anterior divisions of the other spinal nerves, in that each pursues an independent course, i. e., there is no plexus formation.
Detailed explanation-3: -T1 and T2 (top two thoracic nerves) feed into nerves that go into the top of the chest as well as into the arm and hand. T1 is also part of the Brachial Plexus. T3, T4, and T5 feed into the chest wall and aid in breathing. T6, T7, and T8 can feed into the chest and/or down into the abdomen.