Oxygen and carbon dioxide are exchanged in the lungs and through all cell membranes by a. active transport, b. diffusion, c. filtration, d. osmosis.

Video transcript

Hello everyone and welcome to today's video. So the process of gas exchange at the cellular level is influenced by all except as answer choice. A we have oxygen utilization by cells B, carbon dioxide production by cells c cellular metabolism, the partial pressure of oxygen in the atmosphere. Now before we jump into our answer, choices, remember that gas exchange or is a very popular example of gas exchange as it occurs in cells is going to be the exchange of CO2 and oxygen. Now keep that in mind as we go over our answer choices. First of all, we have a oxygen utilization by cells. We are asking the question that which of the following are involved in the process of gas exchange at a cellular level. Now, oxygen is definitely a part of gas exchange at a cellular level as it occurs by cells. And therefore we can cancel this out because we're being asked for the exception. Then we have beat carbon dioxide production by cells. Now, when cells are producing energy, carbon dioxide is a byproduct of this energy metabolism. And so cells need to release it and this is where gas exchange is going to be occurring with this carbon dioxide accident in the cell. But it is also part of this gas exchange at a cellular level. So we can also cancel it out. Then we have C which is cellular metabolism. But remember that metabolism refers to many processes that occur within the cells such as energy production. So we can put this in the same category as answer choices A and B and we can also cancel it out because gas exchange is a part of the metabolism of these cells. And then we have the which is the partial pressure of oxygen in the atmosphere. Now, the partial pressure of oxygen in the atmosphere is going to be referring to the concentration of oxygen that is present in a certain environment. Now, while this concentration of oxygen could have effects on what the organism is capable of doing. It will not have a direct effect on the gas exchange. These organisms still need to perform gas exchange at the same level regardless of the availability of oxygen or not. It's just that if there is not enough oxygen available, the organism would just not be able to exist. So it will simply die. However, this does not have any influence on gas exchange at a cellular level. And therefore, we can highlight answer choice d partial pressure of oxygen in the atmosphere. As a final answer to a question, I really hope this video helped you and I hope to see you on the next one.