Reference no: EM133929827
Question
Looking at Blood
Part 1: Exploring blood cell morphology
1. Describe the formed elements you see in this blood smear.
2. Can you see the plasma (liquid matrix)? Why or why not?
3. How many types of leukocytes can you identify in the images of blood cell stack? What color are the white blood cells in these images? Why?
4. Describe the relative abundance of erythrocytes, leukocytes, and thrombocytes.
5. Observe all of the cells in your blood cell type image. Which blood cell type (erythrocyte, leukocyte, thrombocyte, platelets) appears to be the most variable in appearance? Why?
6. Which blood cell type appears to be the least variable in appearance? Why?
7. Using your observations of the cells, determine whether or not each cell type has a nucleus or the presence of granules in the cytoplasm. Record your answers in the table 1 on your data sheet.
8. Describe the shape of each blood cell nucleus (if present) in table 1.
9. Why is the nucleus difficult to see in basophils?
10. Neutrophils are often referred to as polymorphonuclear leukocytes (PMNs or "polys"). Why?
Part 2: Comparison of blood cell size
1. Calculate the average diameter of cells and average diameter of the nuclei of each blood cell type. Record these values in table 2 on the data sheet.
2. Which cell type is the largest? Which cell type is the smallest?
3. How does their size relate to their function?
4. Why is this especially significant for the erythrocyte?
5. What is the shape of the erythrocyte as shown by this surface plot?
Part 3: Exploration: Hematocrits
1. Hematocrits 1-6 are in the normal range for adult males and females. What is the approximate range of red blood cell percentages for males? For females?
2. Hematocrits 8 and 9 are from the same person. This person had a hematocrit done in May while living in Florida. She then spent the summer in Telluride, Colorado and repeated the hematocrit in September. Which hematocrit is from September? Why do you think so?