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What else can I help you with?
Does transported substances never physically cross the plasma membrane in endocytosis?
In endocytosis, transported substances are enclosed in vesicles formed from the plasma membrane, which do physically cross the plasma membrane. These vesicles then transport the substances into the cell.
Why can oxygen easily cross the plasma membrane but sodium ions are unable to cross the plasma membrane?
Oxygen is a small, nonpolar molecule that can cross the plasma membrane via simple diffusion. Sodium ions, on the other hand, are charged and larger molecules that cannot easily pass through the hydrophobic interior of the plasma membrane. Sodium must rely on specific transport proteins like ion channels or pumps to cross the membrane.
How do glucose molecules cross a plasma membrane?
Facilitated Diffusion
What process does oxygen and carbon dioxide use to cross the plasma membrane?
diffusion
What molecules can freely cross the plasma membrane?
Proteins, Carbohydrates, and Cholesterol. (Check out, 'fluid mosaic')
How water cross the plasma membrane?
I think it's cytoplasme, but I don't exactly know.
What depends on a molecule that can cross the plasma membrane?
The size, charge, and hydrophobicity of a molecule determine its ability to cross the plasma membrane. Small, nonpolar, and uncharged molecules can typically pass through the membrane via simple diffusion, while larger, charged, or hydrophilic molecules may require transport proteins or channels to facilitate their movement.
Does egg albumin moves across a plasma membrane?
No, egg albumin is a large protein molecule that cannot pass through the plasma membrane on its own. It would require specific transport mechanisms, such as endocytosis or facilitated diffusion, to cross the membrane.
Ions cannot cross back and forth across the neuron cell membrane?
Ions can cross the neuron cell membrane through ion channels that open and close in response to various stimuli, allowing for the movement of ions in and out of the cell. This movement is essential for action potentials and communication between neurons.
What indicates how easy it is for a substance to cross the plasma membrane?
Whether it's charged or not, hydrophilic, hydrophobic and its size.
Why does hydrophobic molecules cross the plasma membrane while hydropilic cannot?
Hydrophobic molecules can easily cross the plasma membrane because they are nonpolar and can dissolve in the lipid bilayer, allowing them to pass through without assistance. In contrast, hydrophilic molecules are polar and cannot easily penetrate the hydrophobic core of the membrane, which acts as a barrier to their passage. As a result, hydrophilic substances often require specific transport proteins or channels to help them cross the membrane.
How does nitric oxide cross the plasma membrane?
Nitric oxide can diffuse freely across the plasma membrane due to its small size and lipophilic nature. It does not require a specific transporter or receptor for entry into cells.
