Download cell transport review sheet

Name______________________________ Date______________ Biology 512
Ms. Chen
Review Sheet – Cell Transport
Concepts
(1) What is diffusion?
(2) What is dynamic equilibrium?
(3) What is facilitated diffusion?
(4) What is osmosis?
(5) Define the terms: hypotonic, hypertonic, isotonic
(6) What happens to an animal cell and plant cell when placed in a hypotonic, hypertonic,
isotonic solution? Why?
(7) What is lysis?
(8) What is plasmolysis?
(9) Describe the fluid mosaic model of the cell membrane. What is the cell membrane
composed of? What parts of the membrane is hydrophobic? Hydrophilic?
(10)
For each type of cell transport below, be able to describe how molecules are
transported:
a. Passive transport
i. Diffusion
ii. Facilitated diffusion
1. Osmosis
b. Active transport
i. Using a membrane protein to cross the membrane
ii. Bulk flow – molecules do not cross the membrane
1. Endocytosis
a. Phagocytosis
b. Pinocytosis
2. Exocytosis
Labs
Diffusion and Osmosis lab part 1 – dialysis bag (model cell)
(1) Did iodine, glucose and starch molecules diffuse through the semi-permeable membrane?
a. How did you determine whether these molecules diffused or not? What was your
evidence?
b. What was your glucose indicator and how does it work?
c. What was your starch indicator and how does it work?
d. How big were the molecules of iodine, glucose and starch compared to the pores
of the semi-permeable membrane? How did you know?
e. What determines whether a molecule was able to diffuse through the model cell?
Diffusion and Osmosis lab part 2 – osmosis (red onion cell in salt solution or water)
(2) What happens to a plant cell when you add salt solution to it? Why? Is the salt solution
hypertonic, hypotonic or isotonic compared to the cell?
a. Draw a picture and label the cell wall, cell membrane and cytoplasm.
b. Draw an arrow showing the direction of osmosis.
(3) What happens to a plant cell when you add distilled water to it? Why? Is the distilled
water hypertonic, hypotonic or isotonic compared to the cell?
a. Draw a picture and label the cell wall, cell membrane and cytoplasm.
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b. Draw an arrow showing the direction of osmosis.
(4) What happens to an animal cell when you add salt solution to it? Why? Is the salt
solution hypertonic, hypotonic or isotonic compared to the cell?
a. Draw a picture and label the cell membrane and cytoplasm.
b. Draw an arrow showing the direction of osmosis.
(5) What happens to an animal cell when you add distilled water to it? Why? Is the
distilled water hypertonic, hypotonic or isotonic compared to the cell?
a. Draw a picture and label the cell wall, cell membrane and cytoplasm.
b. Draw an arrow showing the direction of osmosis.
(6) Go over all the questions from the Diffusion through a Membrane lab.
Osmosis in a Chicken Egg Demo
(7) When an egg without a shell is soaked in corn syrup overnight, what happened and why?
Explain in terms of osmosis. Where was it hypotonic? Where was it hypertonic?
(8) When an egg without a shell is soaked in distilled water overnight, what happened and
why? Explain in terms of osmosis. Where was it hypotonic? Where was it hypertonic?
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