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The reason that water soluble molecules cannot enter certain regions of the plasma membrane is due to the presence of?
Wiki User
∙ 11y ago
gated channels which close when ions are present
Wiki User
∙ 11y ago
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How specific membrane molecules take part in process of growth and differentiation of tissues?
the growth of the plant in certain regions happens only because of the dividing tissue also known as the meristematic tissue , the processof maristematic tissue of taking up a permanent shape, size, and function is called as the differentiation.It is the process to form a permanent tissue ,and this process include uncountable membrane molecules, because of this complex process.
Facilitated diffusion moves large molecules through what?
Glucose and polypeptides.
Why do marine organisms living in polar regions have a very high proportion of cholesterol in their membrane?
Marine organisms living in polar regions have a very high proportion of cholesterol in membranes to keep the membranes more fluid and keep the molecules moving faster because in cold temperature, molecules move slower.
What is the physical difference in the number of molecules between two regions of space A.concentration gradient B.plasma membrane C. receptor proteins D. phospholipid layer?
Concentration gradient.
Explain the function of the cell membrane?
The plasma membrane separates the cell from its' surrounding environment and is arranged in a bilayer sheet of phospholipids. It is a mosaic of molecules in a fluid. That is, the molecules are able to float around slowly (like islands in the sea). The cholesterol molecules are scattered among the phospholipids to allow the membrane to function properly at body temperature. Most of the bilayer is hydrophobic; therefore water or water-soluble molecules do not pass through easily. A cell controls what moves through the membrane by means of membrane proteins embedded in the phospholipid bilayer. Some membrane proteins have carbohydrates attached to them, forming glycoproteins that act as identification markers.
The process of “diffusion” through a membrane may be described by which of the following ?
: the movement of ions and molecules away from regions where they are in high concentration towards regions where they are in lower concentration.
How specific membrane molecules take part in process of growth and differentiation of tissues?
the growth of the plant in certain regions happens only because of the dividing tissue also known as the meristematic tissue , the processof maristematic tissue of taking up a permanent shape, size, and function is called as the differentiation.It is the process to form a permanent tissue ,and this process include uncountable membrane molecules, because of this complex process.
Facilitated diffusion moves large molecules through what?
Glucose and polypeptides.
Why does marine organism living in polar regions have high proportion of cholesterol in their membrane?
Marine organisms living in polar regions have a very high proportion of cholesterol in membranes to keep the membranes more fluid and keep the molecules moving faster because in cold temperature, molecules move slower.
Why do marine organisms living in polar regions have a very high proportion of cholesterol in their membrane?
Marine organisms living in polar regions have a very high proportion of cholesterol in membranes to keep the membranes more fluid and keep the molecules moving faster because in cold temperature, molecules move slower.
What is the physical difference in the number of molecules between two regions of space A.concentration gradient B.plasma membrane C. receptor proteins D. phospholipid layer?
Concentration gradient.
Explain the function of the cell membrane?
The plasma membrane separates the cell from its' surrounding environment and is arranged in a bilayer sheet of phospholipids. It is a mosaic of molecules in a fluid. That is, the molecules are able to float around slowly (like islands in the sea). The cholesterol molecules are scattered among the phospholipids to allow the membrane to function properly at body temperature. Most of the bilayer is hydrophobic; therefore water or water-soluble molecules do not pass through easily. A cell controls what moves through the membrane by means of membrane proteins embedded in the phospholipid bilayer. Some membrane proteins have carbohydrates attached to them, forming glycoproteins that act as identification markers.
How do nonpolar regions of a membrane proteins cause proteins to be held in the membrane?
IB sucks
The hydrophilic regions of a membrane protein are most likely to be found?
The hydrophilic regions of a transmembrane protein are likely to be found on the exterior of the membrane. The transmembrane protein may have three parts: a hydrophilic segment, a hydrophobic segment, and another hydrophilic segment. The hydrophobic region would be in between the hydrophilic regions. The hydrophobic region will be embedded in the membrane and the hydrophilic regions will be on the inside and outside of the membrane.
What do hydrophobic regions of molecules feel?
greasy
What is the process of molecules from an area of high concentration to low?
Diffusion describes the spread of molecules through random motion from regions of higher concentration to regions of lower concentration.
Difference in osmosis and diffusion?
Diffusion is the spread of particles through random motion from regions of higher concentration to regions of lower concentration.... Osmosis is the net movement of solvent molecules through a partially permiable membrane into a region of higher solute concentration, in order to equalize the solute concentrations on the two sides....
