Cell Transport Intro Questions
Directions: Using your book, answer the following questions.
1. If a substance is able to move across a membrane, the membrane is said to be
_______________.
2. ____________________________ moves substances within the cell and moves
substances out of the cell.
3. Substances moving constantly in random motion is _________________________.
4. What is diffusion?
___________________________________________________________________
5. In which direction does diffusion occur? _________ to __________
6. What supplies the energy for diffusion? __________________________________
7. Molecules are constantly _____________________.
8. When the concentrations are the same throughout, the system has reached
_________________________.
9. What 3 factors affect the rate of diffusion? ______________, ____________, &
______________.
10. ___________ can diffuse across the plasma membrane but most other substances
____________.
11. What is facilitated diffusion?
________________________________________________________
12. What is the difference in channel proteins and carrier proteins?
__________________________________________________________________
13. Define osmosis.
___________________________________________________________________
_
14. The 2 parts of a solution are the ________________ and _________________.
15. The concentration of solution _______________ when the amount of
_____________ increases.
16. When dynamic equilibrium is reached, do water molecules stop moving? ________
17. When a cell is in a solution that has the same concentration of water and solute, the
cell is said to be in an ____________________________.
18. The cell is at ____________________ with the solution, and there is no net
_________________of water.
19. When a cell is in a solution that has a lower concentration of solute, the cell is said be
to in a ___________________________.
20. Hypotonic means there is more water ______________ the cell.
21. Water moves ___________ the cell; this causes the cell to _____________.
22. When a cell is placed in a ________________solution, the concentration of solute
outside the cell is higher than inside.
23. Hypertonic means there is more water _____________ the cell.
24. Water moves __________ the cell; this causes the cell to ____________.
25. Define active transport.
__________________________________________________________
26. Active transport helps maintain ________________.
27. What is the best-known carrier protein pump in animal cells?
_______________________________
28. ___________________ ions are pumped out, while ______________ ions are
pumped into the cell.