Name: _________________________________________________  

IT’S IN THE BAG!!

Cell Membrane Transport

OBJECTIVE:

            DEMONSTRATE an understanding of the movement of molecules across a cell membrane.

MATERIALS:

four candies                2 twist ties                   1 plastic shopping bag                        a pair of scissors

PROCEDURE:

Your task is to get four candies into a plastic shopping bag. Sounds pretty easy, but here are a few rules that you must follow that make the task a little more of a challenge.

RULES:

·         The four candies MUST enter the bag at the same time.

·         The four candies MUST enter through the solid part of the bag (NOT the opening at the top).

·         The internal environment of the bag must not be exposed to the external environment.

·         When the candy finally enters the bag it must remain together in the form of a cluster.

·         Do NOT eat the candy until you have completed the task and shown the solution to your teacher.

·         Do NOT discuss any part of this activity with any other students in the class.

·         Failure to follow any of these rules will result in a failing grade for this activity.

DESCRIBE the procedure you plan to follow according to the rules in order to get the candy in the bag. NUMBER each step.

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ANALYSIS:

1.      DEFINE, in your own words, the following terms:

a) passive transport-

            b) active transport-

            c)endocytosis-

            d)exocytosis-

2.      RELATE, citing details from the activity, the process that you went through to one of the cellular transport processes that you learned about (and defined above) ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

3.      LIST and DESCRIBE the two forms of endocystosis you learned about.

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4.      Which of the two above was the process in this activity?

5. If you cut a hole in the bag, what would this simulate in the cell?