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.
Experiment Results Predict Question: Predict Question: Predict how the hematocrits of the patients living in Denver, Colorado (approximately one mile above sea level), will compare with the hematocrit levels of the patients living in Boston, Massachusetts (at sea level). Your answer : c. The hematocrits of the Denver residents will be higher than those of the Boston residents. Stop & Think Questions: Why would the hemoglobin levels of an anemic patient be lower than the hemoglobin levels of a normal, healthy individual? You correctly answered: c. Because hemoglobin resides in RBCs, you would anticipate a low hematocrit level to coincide with a low hemoglobin level. Experiment Data: Blood sample 1 2 3 4 5 6 Height of column of blood 100 mm 100 mm 100 mm 100 mm 100 mm 100 mm Height of red blood cell layer 48 mm 44 mm 55 mm 53 mm 19 mm 32 mm Height of buffy coat (white blood cells) 1 mm 1 mm 1 mm 1 mm 0.5 mm 1 mm Hematocrit 48 44 55 53 19 32 % WBC 1 1 1 1 0.5 1
Post-lab Quiz Results You scored 50% by answering 2 out of 4 questions correctly. 1. Anemia refers to You correctly answered: c. a lower-than-normal hematocrit. 2. To complete the blood test to measure hematocrit, you must seal the blood-containing capillary tubes on one end with a clay material so that Your answer: a. no additional oxygen enters the blood sample....
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