It is desired to determine the blood volume of a live mouse. To do this, 0.10 mL

Question

It is desired to determine the blood volume of a live mouse. To do this, 0.10 mL of a saline suspension of red blood cells labeled with Fe is injected into the tail vein. Before Ejection the gamma rays were counted for this 0.10-mL solution, and the count rate was found to be 1.0 Times 10^4 counts per minute. After a sufficient time for the blood to be thoroughly mixed, 0.10 mL of blood is removed and counted. The sample is found to have a count rate of 476 counts per minute. What is the approximate blood volume of the mouse? 0.48 mL 21 mL 4.8 mL 4.7 mL 2.1 mL

Explanation / Answer

Blood volume of the mouse= (10000/476)*0.10 ml = 2.1 ml

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