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Which cell part determines what molecules move into or out of the cell?
Wiki User
∙ 14y ago
The Semi-Permiable Cell Membrane
Wiki User
∙ 14y ago
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How do transport proteins work?
They are used in Facilitated Diffusion, helping to transport ions, macromolecules, and other substances incapable of entering a cell by themselves to cross through the plasma membrane of the cell.
Does heat expand rubber?
Whether a material expands or contracts when it is heated can be ascribed to a property of the material called its entropy. The entropy of a material is a measure of the orderliness of the molecules that make up the material. When the molecules are arranged in an ordered fashion, the entropy of the material is low. When the molecules are in a disordered arrangement, the entropy is high. (An ordered arrangement can be thought of as coins in a wrapper, while a disordered one as coins in a tray.) When a material is heated, its entropy increases because the orderliness of its molecules decreases. This occurs because as a material is heated, its molecules move about more energetically. In materials made up of small, compact molecules, e.g., the liquid in a thermometer, as the molecules move about more, they push their neighbouring molecules away. Rubber, on the other hand, contains very large, threadlike molecules. When rubber is heated, the sections of the molecules move about more vigorously. In order for one part of the molecule to move more vigorously as it is heated, it must pull its neighbouring parts closer. To visualize this, think of a molecule of the stretched rubber band as a piece of string laid out straight on a table. Heating the stretched rubber band causes segments of the molecules to move more vigorously, which can be represented by wiggling the middle of the string back and forth. As the middle of the string moves, the ends of the string get closer together. In a similar fashion, the molecules of rubber become shorter as the rubber is heated, causing the stretched rubber band to contract
Which cell part controls the cell's activities?
I think you are talking about the nucleus, which is the "brain" of the cell. It controls everything that cell does.
What does the cellular membrane do?
It selectively regulates the passage of substances into and out of the cell. It is a very important part of a cell. the cell membrane holds all of the stuff inside of the cell. Also it shapes the cell that is how a animals cell is circled and a plants cell has squared cells.
The part of a sound wave where the molecules are spread apart is called?
compression
What part of the cell acts like a selective filter and determines what goes in and out of the cell?
The plasma membrane is selectively permeable, allowing certain molecules to travel in and out of the cell. The size, PH, and temperature all play a factor in what molecules travel through the membrane or don't.
How will the cell maintain homeostasis if it is hypertonic?
Part of the cell that functions to maintain homeostasis relative to the cell's passage of large molecules and particles to an area outside the cell.
What can you compare endoplasmic reticulum to?
A highway, as it is a path along which molecules move from one part of the cell to another.
What determines a cell's shape?
the system its part of
What part of a cell determines what enter a cell?
nucleus and membrane/wall
What part of a cell determines the characteristic of a living thing?
The DNA in a cell determines the characteristics of living things
Cell part that determines what traits a living will have are?
chromosomes
What part of the cell determines what it will look like?
the DNA
Water molecules move into cell by diffusion?
Cell membranes have hydrophilic (water loving) and hydrophobic (water repulsing) ends. It also tries to keep a balance of water with the outside environment. So when the cell is dry, it takes in more water through special channels in the cell membrane.
What part of the cell determines what goes in and out of the cell?
The membrane of the cell is what determines comes in and out of it.
What cell part receives nerve impulses and hormones from other?
receptor molecules on cell membranes receptor molecules on cell membranes
Which part of the cell surrounds the cell and allows molecules in and?
The cell membrane is the thing that surrounds the cell. The cell membrane contains proteins that allow active transport of molecules in and out of the cell.
