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Which molecule would be unable to diffuse through a cell membrane?
A molecule that is too large or charged would be unable to diffuse through a cell membrane.
How can water go through the cell membrane when it is polar?
Because it is a small molecule, water can diffuse through the cell membrane.
What is the molecule that requires energy to pass through the cell membrane?
The molecule that requires energy to pass through the cell membrane is typically an ion or a large polar molecule, such as glucose, which moves against its concentration gradient. This process is known as active transport and involves the use of ATP or other energy sources to facilitate the movement of these substances through specific transport proteins in the membrane. Examples include sodium-potassium pumps and glucose transporters.
Molecules A and B come in contact with the cell membrane of the same cell Molecule A passes through the cell membrane readilybut molecule B does not Which statement could describe molecules A an?
Molecule A is likely smaller and more hydrophobic, allowing it to pass through the cell membrane easily via simple diffusion. Molecule B may be larger, polar, or charged, requiring a transporter or channel for passage across the cell membrane.
What part of the membrane would help a large protein molecule enter the cell?
Globular Proteins
Which molecule would most likely be actively transported?
A larger molecule or a polar molecule that cannot passively diffuse through the cell membrane would most likely be actively transported. Examples include glucose, ions (such as sodium and potassium), and amino acids.
What diffuses more easily into a cell Na or isobutane?
Isobutane diffuses more easily into a cell because it is a small nonpolar molecule that can pass through the cell membrane via simple diffusion. Sodium (Na) is a charged ion and cannot easily pass through the hydrophobic interior of the cell membrane without the assistance of specific transport proteins.
How does potassium and sodium move into the cell?
Potassium enters the cell through potassium channels that open in response to changes in membrane potential. Sodium enters the cell through sodium-potassium pumps, which actively transport sodium ions against their concentration gradient.
What molecule does cell membrane contain?
The cell membrane contains phospholipids.
How do molecules that are too large to cross the membrance enter into the cell?
Large molecules can enter a cell through endocytosis, where the cell membrane folds around the molecule, forms a vesicle, and brings it into the cell. This process allows the cell to take in nutrients, signaling molecules, and other substances that are too large to pass through the membrane directly.
What is FALSE regarding the membrane potential?
Both potassium and sodium ions can "leak" through the cell membrane due to diffusion.
Large molecules are surrounded by the cell membrane and enter the cell?
Large molecules can enter cells through processes like endocytosis, where the cell membrane surrounds the molecule and engulfs it in a vesicle. This allows large molecules to be transported into the cell without crossing the lipid bilayer of the membrane.
