Question

How does oxygen and carbon dioxide move across cell membranes in humans?

Answer 1

Hint: Oxygen and carbon dioxide are major elements for human beings to survive on this planet as oxygen is the gas which is inhaled by humans and carbon dioxide is exhaled and as plants intake carbon dioxide and exhale oxygen so these two gasses are important in our life.

Complete answer:
1)Across cell membranes, oxygen and carbon dioxide move or transport via simple diffusion, and no energy input is required in this process, and on either side of the cell membrane, it is driven by differences in concentration.

2)Inside the cell to the area of lower concentration, the oxygen diffuses by the cell membrane, and oxygen-rich blood travels by a cell as the oxygen molecule is small in size and has no charge or polarity; this is the reason for easy movement of the oxygen.

3)In the cell, oxygen is the element that is rapidly taken by the mitochondria and this rapid consumption leads to the constant movement of oxygen from the blood into the cell.

4)In a cell, Carbon dioxide is of higher concentration and it is created as a waste product in cellular respiration by mitochondria so this gas is also diffusing out easily from the cell membrane and these movements do not require any energy on behalf of the cell.

Note: A real-life example of diffusion can be the spreading of an air freshener through a room or to give color to the glass of water few drops of dyes are enough as in this molecules travel from higher to lower concentration.