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The fastest nerve fibers in the body can conduct impulses up to approximately

meters per second.
Answer and Explanation

The Correct Answer is {"dropdown-group-1":"C"}

A. 60: This is the speed of some moderately fast fibers, but not the maximum.

B. 85: This is fast, but still below the maximum capacity of Type A alpha fibers.

C. 130: Large-diameter, heavily myelinated fibers (Type A) can conduct impulses at speeds ranging from 70 to 120–130 meters per second.

D. 190: This exceeds the biological limit for nerve conduction velocity in humans.


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Related Questions

Correct Answer is {"dropdown-group-1":"B"}

Explanation

A. Spectrin: As noted earlier, this is a protein that helps maintain the shape of red blood cells.

B. Hematocrit: A hematocrit test measures the "packed cell volume" to see what percentage of whole blood is made up of red blood cells.

C. Hematopoiesis: This is the physiological process of blood cell formation, not a measurement.

D. Hemocytometer: This is a specialized slide used to count individual cells under a microscope, but it does not measure the volume percentage directly like a centrifuge/hematocrit.

Correct Answer is B

Explanation

A. hemostasis: This is the general term for the process of stopping bleeding, which includes clot formation, not dissolution.

B. fibrinolysis: Fibrinolysis is the enzymatic breakdown of the fibrin mesh in blood clots, primarily performed by the enzyme plasmin.

C. erythroblastosis: This refers to the abnormal presence of erythroblasts (immature red blood cells) in the blood, usually related to hemolytic disease.

D. diapedesis: This is the process of white blood cells "squeezing" through capillary walls to enter tissues.

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