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PEX 11 01

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PEX 11 01
Name: dell
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
You correctly answered: b. of 40 means that 40% of the volume of blood consists of RBCs.
2. A buffy coat layer
Your answer : a. consists of WBCs.
Correct answer: 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.

05/20/15

page 1

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 : a. The hematocrits of the Denver residents will be lower 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

05/20/15

Height of buffy coat
(white blood cells)
1 mm
1 mm
1 mm
1 mm
0.5 mm
1 mm

page 2

Hematocrit

% WBC

48
44
55
53
19
32

1
1
1
1
0.5
1

Post-lab Quiz Results
You scored 75% by answering 3 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
You correctly answered: d. the blood sample can be centrifuged without having the blood spray out of the tube.
3. Possible

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