8. Platelets and red blood cells are components of the blood. A typical platelet and red blood cell have diameters of approximately 2.33×10^ −6 m and 0.0000075 m, respectively. Which blood component has a bigger diameter, and approximately by how much?
option 1: A platelet has a bigger diameter than a red blood cell by 5.17×10^−6 m.
option 2:A red blood cell has a bigger diameter than a platelet by 9.83×10^−6 m.
option 3: A platelet has a bigger diameter than a red blood cell by 5.17×10^−6 m
option 4: A red blood cell has a bigger diameter than a platelet by 5.17×10^−6 m.
The correct option is option 3: A platelet has a bigger diameter than a red blood cell by 5.17×10^−6 m.
To determine this, we compare the diameters of the platelet and the red blood cell. The diameter of a platelet is given as 2.33×10^−6 m, while the diameter of a red blood cell is given as 0.0000075 m.
Since the diameter of a platelet is smaller than the diameter of a red blood cell, we can subtract the diameter of the platelet from the diameter of the red blood cell to find the difference in diameter:
0.0000075 m - 2.33×10^−6 m = 4.17×10^−6 m
Therefore, the platelet has a bigger diameter than the red blood cell by approximately 5.17×10^−6 m.