Physio Ex 9 Experiment 11 Activity 1 Essay

885 Words Dec 20th, 2012 4 Pages
Exercise 11: Blood Analysis: Activity 1: Hematocrit Determination Lab Report Pre-lab Quiz Results You scored 75% by answering 3 out of 4 questions correctly. 1. Hematocrit Your answer : a. refers to the percentage of white blood cells (WBCs) in a sample of whole blood. Correct answer: b. of 40 means that 40% of the volume of blood consists of RBCs. 2. A buffy coat layer You correctly answered: d. is all of the above. 3. The diagnosis of anemia indicates You correctly answered: a. a lower-than-normal hematocrit. 4. Polycythemia refers to You correctly answered: c. a significant increase in RBCs.

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Experiment Results Predict Question: Predict Question: Predict how the hematocrits of the patients living in Denver
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Possible causes of polycythemia include Your answer: d. an increase in RBCs, resulting in a higher-than-normal hematocrit. Correct answer: b. living at high altitudes. 4. You would expect anemia to develop in a person You correctly answered: c. who has abnormally shaped hemoglobin in their RBCs.

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Review Sheet Results 1. List the hematocrits for the healthy male (sample 1) and female (sample 2) living in Boston (at sea level) and indicate whether they are normal or whether they indicate anemia or polycythemia. Your answer: Healthy Male (Sample 1) = 48 and Healthy Female = 44. Both are normal as the average hematocrit for males is 42-52%, and the average for females is 37-47% 2. Describe the difference between the hematocrits for the male and female living in Boston. Why does this difference between the sexes exist? Your answer: The difference is that men have a higher hematocrit due to being larger in size than women and having more muscle mass and it has been shown that testosterone affects the secretion of erythropoietin (EPO) by the kidneys. EPO is responsible for the formation of red blood cells. Higher testosterone in males means more red blood cell formation and hence a higher hematocrit. 3. List the hematocrits for the healthy male and female living in Denver (approximately one mile above sea level) and indicate whether they are normal or whether they indicate anemia or polycythemia. Your answer: Male=55, Female=53 ; Both are elevated…

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