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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.
How do cells use the process of osmosis and diffusion to take in nutrients and to get rid of wastes?
== == Diffusion is: the movement of particles from regions of higher concentration to regions of lower concentration. Osmosis is: the diffusion of water through a semipermeable membrane.
What process occurs as water moves from regions of higher water concentration to regions of lower water concentrtion across a selectively permeable membrane?
Osmosis
What are three main functional regions of the cell?
The regions or general parts of the cell are1. plasma/cell membrane = outer membrane which separates the inside of the cell from the external environment2. cytoplasm = substance in which organelles are suspended3. organelles = permanent structures that carry out specific acitivities3. inclusions = the secretion and storage areas of the cell
The reason that water soluble molecules cannot enter certain regions of the plasma membrane is due to the presence of?
gated channels which close when ions are present
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 are the three main regions of the cell from the outside in?
Cellular membrane, cytoplasm, nucleus.
How do cells use the process of osmosis and diffusion to take in nutrients and to get rid of wastes?
== == Diffusion is: the movement of particles from regions of higher concentration to regions of lower concentration. Osmosis is: the diffusion of water through a semipermeable membrane.
What process occurs as water moves from regions of higher water concentration to regions of lower water concentrtion across a selectively permeable membrane?
Osmosis
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.
Describe how dissolved particles move across a plasma membrane form regions of lower to higher concentrations?
Things move across the membrane from lower to higher concentrations by active transport.
How do particles get in and out of the plasma membrane?
The movement is random, but there is a net movement from regions where there are lots of particles to ones where there are fewer particles.
What are three main functional regions of the cell?
The regions or general parts of the cell are1. plasma/cell membrane = outer membrane which separates the inside of the cell from the external environment2. cytoplasm = substance in which organelles are suspended3. organelles = permanent structures that carry out specific acitivities3. inclusions = the secretion and storage areas of the cell
What iprocess occurs as water moves from regions of higher concentration to lower across a semipermeable membrane?
Osmosis, which is the diffusion of water.
Are a cell membrane's chemicals locked into place?
Any biological cell membrane or plasma membrane is made up of phospholipid bi-layer, cholesterol, small amounts of glycolipids and specialized proteins. Some components can move little bit around their position but others such as cholesterol add to the rigidity of the membrane. Lipid rafts are also immovable regions of the membrane.
Functions of integral membrane protein?
Integral proteins are found within the membrane and have hydrophobic regions embedded within the membrane and hydrophilic regions that project from both surfaces of the bilayer Many integral proteins are glycoproteins, which have an attached carbohydrate chain. As with glycolipids, the carbohydrate chain of sugars projects externally. There- fore it can be said that the plasma membrane is "sugar- coated." The plasma membrane is asymmetrical: the two halves are not identical. The carbohydrate chains of the glyco-lipids and proteins occur only on the outside surface and the cytoskeletal filaments attach to proteins only on the inside surface
