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How many times does an oxygen molecule cross a plasma membrane when moving from inside an alveolus to the hemoglobin of a red blood cell and what are the plasma membranes?
Wiki User
∙ 15y ago
1. Into the cell of the alveolus 2.+3. Out of the alvealus into cell of the capillary wall 4. Out of the cell of the capillary wall and into blood plasma 5. Into the red blood cell. So 5.
Wiki User
∙ 15y ago
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Does sugar diffuse through the cell membrane?
No. Only non-polar, small molecules can pass through a membrane by simple diffusion. A sucrose molecule is too large a molecule to pass through a membrane by simple diffusion, however, it can pass through a plasma membrane (but not any artificial membranes like Visking tubings) by facilitated diffusion, i.e. through transport proteins(specific carriers for sucrose) embedded in the membranes. ! =)
Which type of molecule forms the cell membrane?
The basic structure of cell membranes is a phospholipid bilayer. Phospholipids have a phosphate group (the head) and a lipid tail.
What pigment is released when a hemoglobin molecule is broken apart?
When a hemoglobin molecule is broken apart, the iron pigment is released. This is what is called the -"heme" part of the molecule.
What is the lipid-based molecule called that coats the air-exposed surface of the alveolus?
Surfactant
Which molecule in animal plasma membranes stiffens and strengthens the membrane?
Methionine, a sulfur-containing amino acid, is an intermediary that helps strengthen cell membranes. The infamous cholesterol that we're often advised to avoid also helps maintain the integrity of cell membranes (and to a lesser degree, the integrity of the membranes of organelles inside the cell). The cell's plasma membrane is considered a fluid mosaic where the lipid molecules in the bilayer move about in the membrane. However, cell membranes may experience transitions which make their molecules more gel-like or nearly solid.
What is the difference between insulin and hemoglobin?
The only thing that they have in common is that they are proteins. Insulin is a molecule that carries glucose across the body cell membranes. Hemoglobin is a very large molecule that contains iron and carries oxygen. The red blood cells are packed with it.
What is the length of hemoglobin molecule?
6.8*10-6mm is the length of a hemoglobin molecule
Does sugar diffuse through the cell membrane?
No. Only non-polar, small molecules can pass through a membrane by simple diffusion. A sucrose molecule is too large a molecule to pass through a membrane by simple diffusion, however, it can pass through a plasma membrane (but not any artificial membranes like Visking tubings) by facilitated diffusion, i.e. through transport proteins(specific carriers for sucrose) embedded in the membranes. ! =)
What lipid molecule makes up 50 percent of the cell membranes?
A phospholipid bilayer makes up most of the cell membrane
Which type of molecule forms the cell membrane?
The basic structure of cell membranes is a phospholipid bilayer. Phospholipids have a phosphate group (the head) and a lipid tail.
Is the B-subunit of the hemoglobin A molecule a complete DNA molecule?
B-subunit of the hemoglobin A molecule is not a complete DNA molecule. It contains 4 subunits
Is the B subunit of the hemoglobin A molecule a complete DNA molecule?
B-subunit of the hemoglobin A molecule is not a complete DNA molecule. It contains 4 subunits
A fully functional molecule of hemoglobin is what kind of protein structure?
The structure of the hemoglobin in a molecule is the quaternary structure.
What substance is transported by hemoglobin?
The hemoglobin molecule is what the oxygen molecule will attach to in the red blood cell.
Hemoglobin is what type of molecule?
A protein Molecule
Can all molecules diffuse through all cell membranes?
No, there are specific cell membranes that allow only certain molecules to pass through. Some stay open and others must be opened ( like a gate ).
What type of molecule is embedded in cell membranes?
Proteins are often found embedded in the cell membrane. These proteins are called transmembrane or inter-membrane proteins.Cholesterol molecules are also found embedded in the hydrophobic interior of the cell membrane in many species
