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What do cells import and export?
Cells import nutrients, such as glucose, amino acids, and vitamins, necessary for their functioning. They export waste products, such as carbon dioxide and urea, as well as signaling molecules and hormones. Transport proteins on the cell membrane facilitate these import and export processes.
Why do cells have a variety of different transport mechanisms across the cell membrane?
Cells need to regulate each substance so its import and export is controlled. If there would be one mechanism to import every substance, the concentration of any individual molecule couldn't be controlled.
What organelle that transports molecules in and out of the cell?
The Endoplasmic Reticulum acts as a transport mechanism in cells, to "import" and "export" things such as proteins from the cell to other parts of the body.
How may one define cellular transport?
Cellular transport refers to the movement of molecules or ions across the cell membrane, either into the cell (import) or out of the cell (export). This process is essential for maintaining proper cellular function by regulating the concentration of molecules inside and outside the cell. Cellular transport can occur through various mechanisms such as passive diffusion, facilitated diffusion, active transport, endocytosis, and exocytosis.
Cone cells are color photoreceptors that use different retinal molecules to absorb different wavelengths of light?
While cone cells are the color photoreceptors in the eye, they use different opsin molecules for the absorption of different wavelengths of light. So the answer would be false.
Do cells combine to make atoms?
No, cells do not combine to make atoms. Atoms are the building blocks of all matter, including cells. Cells are made up of a combination of different atoms, such as carbon, hydrogen, oxygen, and nitrogen, organized into molecules that form the structure and function of the cell.
What a exocytosis?
Exocytosis is a process by which cells release substances from inside the cell to the outside by fusing vesicles containing the substances with the cell membrane. This is a crucial mechanism for the cell to export molecules such as proteins, hormones, and neurotransmitters.
What do aomebas eat?
Amoeba is a holozoic and omnivorous i.e. feeds on bacteria, dead cells, algal cells and phytoplankton etc. Ingest food by phagocytosis by three different ways: by circumfluence, by circuvalate, and by import.
How do some molecules get into cells?
Some molecules get into cells by going through their permeable membrane.
How can different cells in the body of the same organism take up different molecules?
Different cells in the body can take up different molecules due to the presence of specific membrane receptors, transport proteins, and varying permeability of their cell membranes. These factors are influenced by the cell's type, function, and developmental stage, allowing cells to selectively absorb nutrients, hormones, and other molecules necessary for their roles. Additionally, signaling pathways can regulate the expression of these receptors and transporters, further tailoring the uptake process to the needs of each cell type.
Level of organisation in a plant does molecules come before cells?
Yes. Cells are made of molecules.
Is cell larger than molecule?
Cells are larger than molecules. Cells normally have molecules inside them and constantly passing through their membranes. Cells normally contain water molecules along with glucose and other molecules.
