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Questions and Answers
What process allows substances like carbon dioxide or oxygen to move across the cell membrane?
What process allows substances like carbon dioxide or oxygen to move across the cell membrane?
- Diffusion (correct)
- Active transport
- Endocytosis
- Osmosis
How is the movement of substances into and out of the cell primarily facilitated?
How is the movement of substances into and out of the cell primarily facilitated?
- By the rigid cell wall
- By the selectively permeable plasma membrane (correct)
- By the cytoplasm
- By the nuclear membrane
What is the primary function of the cell membrane?
What is the primary function of the cell membrane?
- To store genetic information
- To synthesize proteins
- To provide structural support to the cell
- To separate the contents of the cell from its external environment (correct)
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?
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?
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In what situation does diffusion occur within cells?
In what situation does diffusion occur within cells?
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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.
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Description
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.
