Question

1. if the concentration of oxygen in a body tissue is 5% and the concentration of oxygen in the blood surrounding the cell is 10%, which direction will the oxygen diffuse?

energy and transport challenge

1. why cant sugar pass through the cell membrane?

1. how many atp did you use your first trial?

1. what is a strategy one can use to meet equilibrium and conserve atp?

osmosis challenge

1. what is osmosis?

1. what are solutes?

1. compare the amount of solute to identify the correct term.

a. hypertonic:
b. hypotonic:
c. isotonic:

1. what is the name of the protein that allows water to pass through the membrane?

1. is osmosis active or passive transport?

Explanation:

1. Diffusion occurs from high - to low - concentration. Since oxygen is 10% in blood and 5% in tissue, oxygen will diffuse from the blood into the body tissue.
2. Sugar is a large, polar molecule. Cell membranes are semi - permeable and large polar molecules cannot pass freely through the non - polar lipid bilayer.
3. No information is given about the first trial to determine the amount of ATP used.
4. One strategy could be to use facilitated diffusion or passive transport when possible instead of active transport which consumes ATP.
5. Osmosis is the diffusion of water across a semi - permeable membrane from an area of lower solute concentration to an area of higher solute concentration.
6. Solutes are substances that are dissolved in a solvent to form a solution.
7. a. Hypertonic: Higher solute concentration compared to another solution. b. Hypotonic: Lower solute concentration compared to another solution. c. Isotonic: Equal solute concentration compared to another solution.
8. Aquaporins are the proteins that allow water to pass through the membrane.
9. Osmosis is passive transport as it does not require energy input to move water across the membrane.

Answer:

1. From the blood into the body tissue.
2. It is a large, polar molecule and cannot pass freely through the non - polar lipid bilayer of the cell membrane.
3. Cannot be determined.
4. Use facilitated or passive transport instead of active transport when possible.
5. The diffusion of water across a semi - permeable membrane from an area of lower solute concentration to an area of higher solute concentration.
6. Substances dissolved in a solvent to form a solution.
7. a. Higher solute concentration compared to another solution. b. Lower solute concentration compared to another solution. c. Equal solute concentration compared to another solution.
8. Aquaporins.
9. Passive transport.