The brain consumes about half of the A) oxygen B) glucose C) sodium D) potassium

Question

The brain consumes about half of the A) oxygen B) glucose C) sodium D) potassium E) fatty acids 26. circulating in the body. 27. Which is NOT housed in the medulla oblongata? A) centers for blood pressure control B) centers for control of vomiting C) centers for control of eye movement D) centers for control of breathing E) the pyramids, where tracts cross to the opposite side of the body There is a legend about an autopsy having been performed on a space alien in New Mexico, many decades ago. Assuming that this alien was as well-educated and trained on its planet as NASA educates and trains astronauts on Earth, what feature would be expected in the alien's brain? A) a system of fluid-filled cavities deep in the brain B) a thick band of fibers connecting right and left hemispheres C) an enlarged area with surface grooves and folds D) at least 12 pairs of cranial nerves E) glandular structures resembling the pineal and pituitary 28. 29. Describe a lumbar puncture and explain its purpose. 30. Describe the physical protection afforded by the cerebrospinal fluid.

Explanation / Answer

Brain utilises daily 120g of glucose for its proper fiction. Brains need more glucose 60%of glucose of total body need proper nerve function. Answer is glucose. 2. Meduall oblongata is Lower most part of brain. It has many important centers which controls the vital functions like respiratory center for respiration, breath, vasomotor center for controlling blood pressure, deglutation center for regulation of degkutation, vomitinf center for vomitinf, salivary nuclei for secretionof saliva. It does not house for eye. It has two pyramidal tract which name as corticospinal and corticobulbar. Answer for lumber punctur: it is also known as spinal tap or cisternal puncture. It is method used for collecting csf fluid for diagnostic purposes. In this procedure the puncture needle is introduced into the subarachnoid space in the lumbar region between the 3rd and 4th lunbar spines. In this procedure the reclining body is bent forward, so as to flex the vertebral column as far as possible. Then the body is brought near the edge of table. The higher point of illac crest is determined by palpating. A line is drawn on the back of the subject by joining the highest points of illac crest of both sides. This crises the 4th lumbar spine, then determine 3rd lumbar spine. After needle is introduced into soft tissue space between these two. This procedure done for Collecting csf for diagnosis like meningitis, brain hemorrhage, injecting drugs for spinal anesthesia. Answer 30: cerebrospinal fluid(CSF) act as fluid buffer and protects the brain from shock. When head recives a blow it acts like cushion and prevents the movement of brain against the skull bone and there’s by prevent the damage of brain.

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