CELL+TRANSPORT

How 'stuff' gets into and out of cells

Something you could try at home - egg experiment

Vocabulary you must know homeostasis, plasma membrane, selectively permeable, concentration gradient, dynamic equilibrium, diffusion, osmosis, facilitated diffusion, active transport, passive transport, hypotonic solution, hypertonic solution, isotonic solution, plasmolysis, turgor pressure, turgid, flaccid.

Info Book chapter 8.1

ACTIVITY [|Cell transport vocabulary review - quia] [|Active and passive transport - quia] [|Quizlet study aid] [|Homeostasis multimedia explanation]

Lab [|Online investigation]

Questions you must be able to answer Date  1. What are the differences between diffusion and osmosi  2. What are the similarities between diffusion and osmosis?  3. How do plant cells change when placed in tap/salt water? 4. Which type of cell transport is associated with the movement of carbon dioxide and oxygen molecules? 5. Which type of cell transport is associated with the movement of water molecules?

Date
 * 1) Why does a piece of potato feel soft and bendy when placed in __#|sugar__ water?
 * 2) Will the potato feel any different if it is placed in salt water? Why?
 * 3) How does a piece of potato feel if it is placed in tap water? Why?
 * 4) Why are some molecules able to diffuse across membranes and others not?
 * 5) How is the spraying of vegetables in the __#|grocery__ store related to osmosis?

Date
 * 1) How are facilitated diffusion and active transport different?
 * 2) <span style="display: block; font-family: Arial,Helvetica,sans-serif; font-size: 10pt;">What is the main difference between passive transport and active transport?
 * 3) <span style="display: block; font-family: Arial,Helvetica,sans-serif; font-size: 10pt;">Why do plants wilt when transplanted?
 * 4) <span style="display: block; font-family: Arial,Helvetica,sans-serif; font-size: 10pt;">Why might a gardener sprinkle salt on a slug?