Understanding Red Blood Cells in the Human Body

The video tutorial explains how to calculate the number of red blood cells in a human body using given data. It starts by identifying the total blood volume and the percentage of red blood cells. The tutorial then guides through the process of calculating the volume of red blood cells and dividing it by the volume of a single red blood cell. The video also covers converting numbers into scientific notation and rounding the final result to two decimal places.

What is the total volume of blood in a human body?

• 10 liters

• 7 liters

• 5 liters

• 3 liters

What percentage of blood is made up of red blood cells?

• 40%

• 50%

• 30%

• 20%

How do you calculate the total volume of red blood cells in the body?

• Multiply total blood volume by 40%

• Add 40% to total blood volume

• Divide total blood volume by 40%

• Multiply total blood volume by 50%

What is the volume of a single red blood cell?

• 90 x 10^-15 liters

• 80 x 10^-15 liters

• 70 x 10^-15 liters

• 60 x 10^-15 liters

What is the first step in converting 90 x 10^-15 to scientific notation?

• Multiply by 100

• Add 10 to the exponent

• Divide by 10

• Express 90 as 9 x 10

What is the simplified form of 90 x 10^-15 in scientific notation?

• 9 x 10^-13

• 9 x 10^-15

• 9 x 10^-16

• 9 x 10^-14

How can you adjust 2/9 to be in proper scientific notation?

• Add 10 to the numerator

• Divide by 10

• Multiply by 10

• Multiply by 5

What is the final scientific notation for the number of red blood cells?

• 2.22 x 10^12

• 2.22 x 10^14

• 2.22 x 10^15

• 2.22 x 10^13

Why is it necessary to multiply 2/9 by 10 in the final step?

• To make it a whole number

• To simplify the fraction

• To meet scientific notation criteria

• To increase the value

What is the repeating decimal value of 20/9?

• 2.11

• 2.22

• 2.33

• 2.44