passive diffusion through the lipid bilayer
Water, carbon dioxide and oxygen can enter a cell through the plasma membrane.
Plasma membrane
Gas is carried mostly by the plasma in the blood. The plasma contains dissolved gases such as oxygen and carbon dioxide, which are transported to different parts of the body. Oxygen is transported from the lungs to the tissues, while carbon dioxide is carried from the tissues back to the lungs for elimination.
Small, uncharged molecules like oxygen and carbon dioxide are permeable to phospholipids in the plasma membrane, while ions such as sodium (Na+), potassium (K+), and chloride (Cl-) are not permeable due to their charge.
Substances that can freely dissolve through the plasma membrane are generally small and nonpolar molecules, such as oxygen, carbon dioxide, and ethanol. These molecules are able to pass through the lipid bilayer of the plasma membrane without requiring a specific transport protein.
diffusion
Water, carbon dioxide and oxygen can enter a cell through the plasma membrane.
Plasma membrane
The plasma membrane is responsible for the passive diffusion of oxygen and carbon dioxide into and out of the cell. It regulates the movement of molecules in and out of the cell, allowing for gas exchange.
The rate at which carbon dioxide enters the cell is determined by the concentration of carbon dioxide on each side of the membrane. Carbon dioxide crosses the plasma membrane by simple diffusion.
The carbon dioxide and oxygen are the two main gases in plasma. When blood travels to the lungs the concentration of these two gases changes.
Gas is carried mostly by the plasma in the blood. The plasma contains dissolved gases such as oxygen and carbon dioxide, which are transported to different parts of the body. Oxygen is transported from the lungs to the tissues, while carbon dioxide is carried from the tissues back to the lungs for elimination.
Oxygen, carbon dioxide, and food
Small, uncharged molecules like oxygen and carbon dioxide are permeable to phospholipids in the plasma membrane, while ions such as sodium (Na+), potassium (K+), and chloride (Cl-) are not permeable due to their charge.
No, oxygen is more soluble in plasma and alveolar fluid than carbon dioxide. However, carbon dioxide is transported in the blood more efficiently as bicarbonate ions and dissolved carbon dioxide, rather than in its gaseous form like oxygen.
Small, nonpolar molecules such as oxygen and carbon dioxide would likely move through the lipid bilayer of a plasma membrane most rapidly due to their ability to dissolve in the hydrophobic core of the membrane.
When matter is subjected to the conditions necessary to create plasma it disrupts molecular bonds. Since CO2 has oxygen atoms bonded to the carbon, when it is ionized into plasma, the bonds will be disrupted and the plasma will contain separate carbon and oxygen atoms. A very small fraction of the CO2 might persist as molecular ions but most of them would be CO ions, not the full CO2.