One of your patients is about to undergo emergency surgery to repair an upper abdominal aortic aneurysm. You explain to your patient that there is a distinct risk that when he awakes from surgery, the lower half of his body will be paralyzed
The most likely reason for this is that:
A) the anesthesiologist will incorrectly inject the anesthetic fluid into the spinal cord instead of into the lumbar cistern.
B) the surgeon will accidentally cut into the spinal cord.
C) ligation of the aorta will interrupt blood flow to the great anterior medullary artery (of Adamkiewicz).
D) access to the aorta requires partial transaction of the lumbosacral trunk.
E) during surgery venous thrombosis may result in a stroke.
Ans: C
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When EPSPs originating from a single presynaptic input occur so close together in time that they add together or sum, thereby bringing the postsynaptic cell to threshold, it is called ____________________ summation
Fill in the blank(s) with correct word
____ signals consist of chemicals secreted by cells into the extracellular fluid that elicit effects from the same cell.
Fill in the blank(s) with the appropriate word(s).
A person has alkalosis if the blood pH
A. is below 7.0. B. drops below 7.3. C. rises above 7.5. D. is above 7.0.