What are some key terms to associate with the cell membrane?
- Active transport. The transport of molecules across a membrane and against their natural flow; mediated by carrier proteins and requiring outside energy.
- Carrier protein.
- Channel protein.
- Integral protein.
What are the terms associated with cell transport?
Terms in this set (19) Active transport process where a cell engulfs materials with a portion of the cell’s plasma membrane and releases the contents inside of the cell. exocytosis. Moving of molecules out of the cell using active transport. Fluid Mosaic Model.
What is the term for transport across a cell membrane?
Facilitated transport is a type of passive transport. Unlike simple diffusion where materials pass through a membrane without the help of proteins, in facilitated transport, also called facilitated diffusion, materials diffuse across the plasma membrane with the help of membrane proteins.
What are the skills of a cell membrane?
The cell membrane is able to regulate what comes in and what goes out of a cell. This is called selective permeability. Only very small molecules, such as water, oxygen or carbon dioxide, can easily pass through the lipid bilayer of a cell membrane.
What is another way to say cell membrane?
The cell membrane is also called the plasma membrane or the plasmalemma.
What are three mechanisms of carrier mediated transport?
There are three types of mediated transporters: uniport, symport, and antiport. Things that can be transported are nutrients, ions, glucose, etc, all depending on the needs of the cell.
What is passive transport example?
One example of passive transport is diffusion, when molecules move from an area of high concentration (large amount) to an area of low concentration (low amount). For example, oxygen diffuses out of the air sacs in your lungs into your bloodstream because oxygen is more concentrated in your lungs than in your blood.
What are the two types of membrane transport?
Movement of solutes across membranes can be divided into two basic types: passive diffusion and active transport. Passive diffusion requires no additional energy source other than what is found in the solute’s electrochemical (concentration) gradient and results in the solute reaching equilibrium across the membrane.
What are 3 functions of the cell membrane?
Biological membranes have three primary functions: (1) they keep toxic substances out of the cell; (2) they contain receptors and channels that allow specific molecules, such as ions, nutrients, wastes, and metabolic products, that mediate cellular and extracellular activities to pass between organelles and between the …
What are the 4 functions of a cell membrane?
Functions of the Plasma Membrane
- A Physical Barrier.
- Selective Permeability.
- Endocytosis and Exocytosis.
- Cell Signaling.
- Fluid Mosaic Model.
What are 3 other names for the cell membrane?
Unit 4: Transport
|What are the 3 other names for the cell membrane?||1. plasma membrane 2. fluid mosaic model 3. phospholipid bilayer|
|What is the only job the the cell membrane?||Maintain homeostasis by controlling what an enter and leave the cell.|
How are Substances transported through the cell membrane?
All substances that move through the membrane do so by one of two general methods, which are categorized based on whether or not energy is required. Passive transport is the movement of substances across the membrane without the expenditure of cellular energy.
What is the function of the membrane in a cell?
A Cell membrane is a thin semi-permeable membrane that surrounds the cytoplasm of a cell, enclosing its contents. The membrane also gives a cell its shape and enables the cell to attach to other cells, forming tissues.
How are cell membranes selectively permeable in plant cells?
The cell membranes that enclose cells (inside the cell wall in the cases of plant cells and prokaryotic cells) are selectively permeable. That is, the structure of these membranes is such that they allow certain particles, incl. Endocytosis is the process in which cells absorb molecules by engulfing them.
How is concentration gradient related to cell membrane transport?
This force is directly proportional to the concentration gradient. In other words, the greater the gradient the greater the force. If there are more than one kind of molecule across a cell membrane each molecule has its own concentration gradient or chemical driving force.