The plasma membrane maintains the proper concentration of materials inside a cell by selectively controlling what passes in and out. It is made of phospholipids that form a bi-layer, with proteins and carbohydrates embedded within or attached to the surface. Channel and carrier proteins transport select materials through the membrane, while cholesterol strengthens and stabilizes the structure.
The slides below are about a cell membrane. They define a cell membrane and also discuss how molecules moves in and out of the cell membrane using different channels.
The slides below are about a cell membrane. They define a cell membrane and also discuss how molecules moves in and out of the cell membrane using different channels.
This presentation include different kind of transport mechanism of different material inside the cell and outside the cell including Passive transport and Active transport mechenism.
This presentation include different kind of transport mechanism of different material inside the cell and outside the cell including Passive transport and Active transport mechenism.
Structure and functions of cell, transport across cell membrane, cell
division, cell junctions. General principles of cell communication,
the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body
The basic tenets of the cell theory are as follows:
All living things are made up of one or more cells.
The cell is the structural and functional unit of all living things.
Cells come from pre-existing cells through the process of division.
All cells are the same in regard to chemical composition.
Cells also communicate with each other. Whether in plants, humans, or animals, they connect to create a solid, well formed organism. In humans, cells build tissues, tissues form organs, and organs work together to keep the body alive.
Experts estimate that there are around 200Trusted Source cell types in the human body.
2. Notes: Plasma Membrane (page 8)
• Maintains the proper concentration of
materials inside a cell by controlling the
passage of materials in and out of the cell
3. Notes: Plasma Membrane (page 8)
• Maintains the proper concentration of
materials inside a cell by controlling the
passage of materials in and out of the cell
• Selectively permeable: allows some materials
to pass through while keeping others out
4. Notes: Plasma Membrane (page 8)
• Maintains the proper concentration of
materials inside a cell by controlling the
passage of materials in and out of the cell
• Selectively permeable: allows some materials
to pass through while keeping others out
• All cells have a plasma membrane
5. Notes: Plasma Membrane (page 8)
• Maintains the proper concentration of
materials inside a cell by controlling the
passage of materials in and out of the cell
• Selectively permeable: allows some materials
to pass through while keeping others out
• All cells have a plasma membrane
• Made of phospholipids plus
proteins, carbohydrates, and cholesterol
9. Phospholipids
• “Head” end hydrophilic (loves water)
• “Tail” end hydrophobic (hates water)
• Form a bi-layer with hydrophobic tails in the
middle and hydrophilic heads pointed
outward
10. Proteins
• Can be attached to the surface or embedded
in the membrane
11. Proteins
• Can be attached to the surface or embedded
in the membrane
• Involved in transport through the membrane
12. Proteins
• Can be attached to the surface or embedded
in the membrane
• Involved in transport through the membrane
• Channel proteins form “tunnels” that allow
substances through the membrane
13. Proteins
• Can be attached to the surface or embedded
in the membrane
• Involved in transport through the membrane
• Channel proteins form “tunnels” that allow
substances through the membrane
• Carrier proteins bind to substances and carry
them through the membrane