Questions on slides
What is cell membrane?
Controls what enters and leaves the body.
What is a similarity between osmosis and diffusion?
They both move molecules towards a lower concentration to reach balance.
What molecule provides the energy for this process?
The cell uses the energy in the form of ATP.
What happens if a cell doesn't control what enters or leaves the cell?
It will die.
How does osmosis different from diffusion?
Osmosis uses water as of Diffusion uses water, gas, or solids.
Why is energy required for active transport?
It is needed to move molecules or ions across the cell membrane against the natural concentration gradient.
The difference between passive and active transport?
Passive transport doesn't use energy while active transport does use energy.
Does facilitated diffusion use energy? Explain why it does/why it doesn't.
No. It moves substances naturally from a high concentration to a low concentration, it does not require energy.
What is the primary role of the plasma membrane?
It regulates the entry and exit of substances to maintain the cell's internal environment.
When is Active Transport used?
It is used when a cell needs to move large particles/ drop fluids, or when a material needs to be moved against the concentration gradient.
Why do we need transport proteins?
Some molecules are blocked by the cell membrane, the proteins act like a door to let them through.
What happens when a plasma membrane breaks down?
The cell uses its ability to perform essential functions and regulates its internal balance.
What main direction of the molecule movement in diffusion?
They move to a high concentration to a lower concentration.
What direction do substances move during active transport?
From a lower concentration to an area of higher concentration.
Why does a cell die if if cannot control what enters or leaves?
Because it can no longer maintain homeostasis, causing metabolic processes to fail.