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How does cell size help speed up or slow down the Fusion across the plasma membrane and through the cytoplasm of a cell?
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Which type of molecule can move passively across the membrane?
Water can move passively through a membrane by moving through the pores of a cell. Other substances cannot move through a cell membrane.
What does NOT influence the rate of diffusion of a chemical across a plasma membrane?
Besides the concentration of the chemical, the pore size of the plasma membrane, and the osmotic pressure of the cytoplasm - nothing else influences the rate of diffusion of a chemical across a plasma membrane.
Why some steroid hormones do not require a membrane receptor?
Because they are lipid soluble and therefore are readily diffusable across the cell membrane. Their receptors are found within the cytoplasm or nucleus
What is facilitated diffusion across the phospholipid membrane?
Facilitated diffusion is the movement a substance from high concentration to low concentration across a membrane through a transporter protein or channel
What helps hydrophobic get through the cell membrane?
Cannot not find the specific answer but it is one of these... A. By passive transport directly across the membrane B. by active transport directly across the membrane C. through integral transport proteins
How do substances move across a membrane?
The membrane allows it and cytoplasm also helps it.
What stops cytoplasm from leaking out across the plasma membrane?
the but whole
Materials essential to life processes move across a cell membrane through a variety of methods What cell membrane structure allows water-soluble materials to be passively transported to the cytoplasm?
carrier proteins
Which type of molecule can move passively across the membrane?
Water can move passively through a membrane by moving through the pores of a cell. Other substances cannot move through a cell membrane.
What does NOT influence the rate of diffusion of a chemical across a plasma membrane?
Besides the concentration of the chemical, the pore size of the plasma membrane, and the osmotic pressure of the cytoplasm - nothing else influences the rate of diffusion of a chemical across a plasma membrane.
Why some steroid hormones do not require a membrane receptor?
Because they are lipid soluble and therefore are readily diffusable across the cell membrane. Their receptors are found within the cytoplasm or nucleus
What are 2 substances that diffuse freely across a cell membrane?
CO2, H2O, and O2 can all diffuse across a cell membrane. Also, small polar molecules (uncharged) and hydrocarbons easily diffuse across.
How can osmosis be considered to be the fusion of water across a membrane?
Osmosis is not fusion, and the only way it could be considered to be that is if someone wasn't paying close enough attention when it was being explained.
What moves large amounts of material across the cell membrane?
Through fusion with the cell membrane, vesicles transport large molecules and material in a process called exocytosis.
How do larger molecules move across epithelial membranes in the capillaries?
Large molecules are transported across a cell membrane by the process of process of exocytosis. This is when secretory vesicles secretes large molecules by the fusion of vesicles with the plasma membrane.
What is a transport process by which gases move through a membrane?
Simple Diffusion
What is facilitated diffusion across the phospholipid membrane?
Facilitated diffusion is the movement a substance from high concentration to low concentration across a membrane through a transporter protein or channel
