eng 025 Tiff

Names ___________________________________________________________ Date ______________

Chapter 7 Worksheet

1. What is the function of the plasma membrane?

2. Here is an image depicting a lipid bilayer.

a. What is the main macromolecule that makes up the lipid bilayer?

3. The plasma membrane is not just a lipid bilayer. How does the fluid mosaic model describe the plasma membrane?

4. Your textbook says that most plasma membranes are “fluid”. What does this mean?

5. Describe the following terms below: integral protein, transmembrane protein, peripheral protein, glycolipid, and glycoprotein.

Integral proteins:

Transmembrane proteins:

Peripheral proteins:

Glycolipids:

Glycoproteins

6. How does high and low temperature affect a plasma membrane’s fluidity?

7. How does cholesterol affect a membrane’s fluidity?

Before you continue, scan this QR code and watch this animation; use it to help you answer the questions that follow. If you cannot access it on your phone, put “Membrane Transport Animation” into YouTube and click on the video by Wanis Birouk.

8. How does passive transport differ from active transport?

9. A great example of active transport is the sodium-potassium pump found in most cells. Study each step of Fig. 7.15 on page 137 of your textbook and answer the following questions.

a. What causes ATP to phosphorylate (add a phosphate group to) the transport protein after step 1?

b. Why is Na+ unable to re-bind to the protein once it faces the outside in step 3?

c. What causes the protein to change shape and face the inside of the cell in step 5?

10. Describe the importance of proton pumps in a cell.

11. What are the three main types of passive transport? Describe each of them.

12. Complete the table on the different forms of bulk transport.

13. Describe the differences between bulk transport and active/passive transport.

14. Complete the chart on the different types of tonicity.

18. Why doesn’t a plant cell burst open when it’s placed in a hypotonic solution like an animal cell does?

15. Why do plant cells not benefit from being bathed in an isotonic solution like animal cells do?

Supplemental Material: If you’re a visual person, below are three additional animation videos where you can cement your understanding of membrane transport!

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REFLECTIVE ESSAY TOPIC GENERATOR – ENG 025

You will need to consider three life events/experiences that shaped you and CHANGED YOUR LIFE. You will tie these into a general statement on personal growth learned from these experiences. These items will eventually become your thesis statement, so be sure to consider all elements that you would like to cover in your body paragraphs and throughout your essay.

For Example: 

Experiences 

1) Living with a stepmother and stepsisters who did not value me as a family member or appreciate how hard I worked.

 2) Growing up without familial support or money inspired me to be creative with my resources and appreciate the small things in life (i.e.. my best friends are the mice that live in my attic)

3) People finally recognized my innate goodness and strength of character and took a chance to support me, which ultimately led to my happy ending 

General Statement on Personal Growth and Learning

I had many challenges in my childhood and upbringing, yet I maintained a positive outlook through it all, believing that the key to future happiness was to continue to be kind and believe in my dreams. 

YOUR TURN>>>

Experiences

1) __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

2) __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

3) __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

General Statement on Personal Growth and Learning

__________________________________________________________________________________________________________________________________________________________________

_________________________________________________________________________________

Names ___________________________________________________________ Date ______________

Chapter 7 Worksheet

1. What is the function of the plasma membrane?

2. Here is an image depicting a lipid bilayer.

a. What is the main macromolecule that makes up the lipid bilayer?

3. The plasma membrane is not just a lipid bilayer. How does the fluid mosaic model describe the plasma membrane?

4. Your textbook says that most plasma membranes are “fluid”. What does this mean?

5. Describe the following terms below: integral protein, transmembrane protein, peripheral protein, glycolipid, and glycoprotein.

Integral proteins:

Transmembrane proteins:

Peripheral proteins:

Glycolipids:

Glycoproteins

6. How does high and low temperature affect a plasma membrane’s fluidity?

7. How does cholesterol affect a membrane’s fluidity?

Before you continue, scan this QR code and watch this animation; use it to help you answer the questions that follow. If you cannot access it on your phone, put “Membrane Transport Animation” into YouTube and click on the video by Wanis Birouk.

8. How does passive transport differ from active transport?

9. A great example of active transport is the sodium-potassium pump found in most cells. Study each step of Fig. 7.15 on page 137 of your textbook and answer the following questions.

a. What causes ATP to phosphorylate (add a phosphate group to) the transport protein after step 1?

b. Why is Na+ unable to re-bind to the protein once it faces the outside in step 3?

c. What causes the protein to change shape and face the inside of the cell in step 5?

10. Describe the importance of proton pumps in a cell.

11. What are the three main types of passive transport? Describe each of them.

12. Complete the table on the different forms of bulk transport.

13. Describe the differences between bulk transport and active/passive transport.

14. Complete the chart on the different types of tonicity.

18. Why doesn’t a plant cell burst open when it’s placed in a hypotonic solution like an animal cell does?

15. Why do plant cells not benefit from being bathed in an isotonic solution like animal cells do?

Supplemental Material: If you’re a visual person, below are three additional animation videos where you can cement your understanding of membrane transport!

2