Question

can u please help me with this

10. Counting Cells a. You have 18 cells in 100 Nano litters (18 cells in 0.1 microliters). What is the total of cells in 1 milliliter (ml)? b. You have a sample of RBC (Red Blood Cells). Since there are very tiny we are using only the center square in the figure. After counting under the microscope you have you find 82 cells inside the black area only. How many RBCs do you have per milliliter (ml)

Answer 1

a) number of cells in 0.1 uL= 18

1 mL= 1000 uL

divide 1000 uL with 0.1 uL

1000/0.1=10000

there are 10000 times volume in 1 mL

so the number of cells in 1 mL=18$\times$10000=1.8$\times$10^5 cells.

b) number of cell counted in a large square= 82

number of cells/mL= number of cells in the large square$\times$10000

=82$\times$10000

= 8.2$\times$10^5 cells