Show:
Diffusion
Osmosis
Labs
Passive Transport
Active Transport
100
What is diffusion
When something moves from an area of high concentration to low concentration
100
What is osmosis
The movement of water from an area of low solute concentration to high solute concentration (or from more water to less water)
100
Name one osmosis lab we did
Onion lab or egg lab
100
What is selectively permeable?
The plasma membrane is selectively permeable, meaning it only lets certain things in and out
100
What is active transport?
Moving solutes across the plasma membrane using energy
200
What moves during diffusion - solute or solvent?
solute
200
What is a hypertonic solution?
The outside of the cell has MORE solute
200
What happened to the egg when placed in the corn syrup and why?
It shrunk because water flowed out
200
What type of proteins are needed for passive transport?
Channel proteins
200
What type of protein preforms active transport?
Transport proteins or pumps
300
One example of diffusion
Food coloring, tea, any type of drink where powder is mixed, gases - like smells from food or air freshener
300
What is a hypotonic solution and what happens to the cell when placed in it?
Hypotonic is a solution with LESS water, water flows into the cell and it swells and bursts
300
What happened to the egg in pure water and why?
The egg swelled because water flowed into the cell
300
Does passive transport require energy?
No
300
What are the two types of bulk transport?
Endo and exocytosis
400
Define solute and solvent
Solute - what is being dissolved, whatever is in lesser concentration Solvent - the solution that the solute is dissolved in, greater concetration
400
Why do plants wilt and die when salt is applied to melt the ice in the winter?
The salt creates a hypertonic solution, which causes water to move of the cell by osmosis. The plant cells shrivel and eventually die
400
In the onion lab, the onion cells in water swelled up because water was flowing in. Why did the onion cells not burst? What cell structure was responsible for that?
They did not burst like red blood cells because they have a cell wall
400
Which of the following types of transport are passive? Osmosis, diffusion, active transport or facilitated diffusion?
Osmosis, diffusion, and facilitated diffusion
400
If mitochondria were damaged, which make ATP, what type of transport would be impacted most?
Active transport
500
When red food coloring is dissolved in water, what do you see happening? What type of transport is occuring and how does it work?
The food coloring diffuses from an area of high concentration to low concentration until it reaches equilibrium. At equilibrium, the color of the water is uniformly red
500
In grocery stores, pure water is sprayed on vegetables to keep them looking healthy and fresh. How does this work? Identify the type of transport, define it and explain how it works
The grocer is creating a hypotonic solution outside the plant cells. Water rushes into the cells, keeping the plant cells firm by filling the vacuoles. The type of transport is osmosis, the movement of water from low solute to high solute
500
In the diffusion lab, we looked at a cube that had a divider in the middle that only let small red beads through. Larger white beads could not fit through the holes in the divider. Explain how this represents the plasma membrane
The box is only letting certain things through, this is like how the plasma membrane is selectively permeable and only lets water in or out without a channel protein
500
What is facilitated diffusion and how is it different from diffusion?
Facilitated diffusion uses a channel protein to allow solutes to cross the plasma membrane, in diffusion the solute moves freely through the solvent
500
Which types of transport use energy? Active transport, passive transport, diffusion or osmosis?
Active transport