capillaries
Through the muscles
Water, carbon dioxide and oxygen can enter a cell through the plasma membrane.
Through the cell membrane.
Oxygen, amino acid and glucose.
Glucose and oxygen enter a cell's cytoplasm for aerobic cellular respiration.
Yes it does
Yes, both are necessary for the cell to produce energy to function.
No, they contain too much oxygen so they can't enter our cells. They do however sectrete chemicals, and these chemicals enter the cell
Prevents foreign material from entering the cell; and allows nutrients and oxygen to enter while letting metabolites (waste or functional chemicals) out.
Cell membranes usually allow water, gases (such as oxygen and carbon dioxide), and small uncharged molecules to enter a cell. Larger molecules or charged ions may require specific transport proteins or channels to cross the membrane.
Yes, oxygen particles would enter a cell through diffusion more readily than fat particles due to their smaller size and higher solubility in the cell membrane. Fat particles are larger and less likely to pass through the cell membrane via simple diffusion.
Oxygen enters the body by travelling into the lungs, it then diffuses through the alveoli cell wall into the body's biggest artery, the aorta.