5 Questions
What process allows substances like carbon dioxide or oxygen to move across the cell membrane?
Diffusion
How is the movement of substances into and out of the cell primarily facilitated?
By the selectively permeable plasma membrane
What is the primary function of the cell membrane?
To separate the contents of the cell from its external environment
What is the term for the property of the cell membrane that allows or permits the entry and exit of some materials in and out of the cell?
Selective permeability
In what situation does diffusion occur within cells?
When a substance accumulates in high concentrations inside the cell
Study Notes
Cell Membrane and Transport
- The process that allows substances like carbon dioxide or oxygen to move across the cell membrane is called diffusion.
Facilitation of Movement
- The movement of substances into and out of the cell is primarily facilitated by the cell membrane, which allows certain molecules to pass through while regulating the movement of others.
Cell Membrane Function
- The primary function of the cell membrane is to regulate the movement of materials in and out of the cell.
Cell Membrane Properties
- The term for the property of the cell membrane that allows or permits the entry and exit of some materials in and out of the cell is selectively permeable or semi-permeable.
Diffusion
- Diffusion occurs within cells when there is a concentration gradient, where molecules move from an area of higher concentration to an area of lower concentration, resulting in uniform distribution.
Test your knowledge of cell biology with this quiz on the cell membrane and its functions. Explore how substances move into and out of the cell and understand the concept of selectively permeable membranes.
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