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Lab Report 6 – Cell Membranes and Transport
Complete the Online Labster Assignment – Lab 6: Cell Membranes and Transport
Take Notes During the Lab
Complete This Worksheet
You can read the Background Theory information in the labpad to get definition info.
What is the name of the scientist that asks you to help with their experiment?
2. What is the scientist trying to produce using their research?
What is the role of the plasma membrane?
What is the structure of the plasma membrane? Describe its molecules and the different layers based on their hydrophobic or hydrophilic nature.

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14:34

The Working Cell: Explaining the Structure and Function of the Plasma Membrane

Explain the structure and function of the plasma membrane, including the phospholipid bilayer, integral proteins, peripheral proteins, and cholesterol. Describe the many functions of membrane proteins. What influences membrane fluidity?

Be able to explain the different concepts involving cellular transport: passive transport (simple diffusion, osmosis) and facilitated diffusion, as well as active transport (exocytosis and endocytosis). What substances move easily? What substances are more difficult to move and why? How would oxygen (O2) pass across the membrane? How about glucose, ions, large protein molecules, water, and cholesterol? Discuss isotonic, hypertonic, and hypotonic solutions and how cells behave in each.

03:56

In this lab, you will observe the diffusion of a substance across a selectively permeable membrane. The plastic bag is selectively permeable like a membrane, allowing smaller molecules to pass. Iodine is an indicator for starch and will turn from reddish brown to dark black in the presence of starch.

Pre-lab questions:- What is in the plastic bag?- What color is it?- What is in the cup?- What color is it?- What do you predict will happen to the iodine and cornstarch molecules? (Hypothesis)

How is the plastic bag similar to a cell membrane?

Post-lab questions:- What is in the plastic bag?- What color is it?- What is in the cup?- What color is it?- Which molecule(s) diffused across the membrane? Explain your answer.- Is this active or passive transport?- How did you know?

01:22

BIO 101 Lab 05: Osmosis and Diffusion – Elodea and Red Blood Cells – Name: Section:After viewing the videos, complete this activity. When complete, submit completed pages 4, 5, and 6. Save and attach your name. Osmosis lab. List three different structures that are present in plant cells but not in animal cells.Explain which two plant cell structures can be readily seen in the video and images.Label the image of a cell membrane. See Chapter 5 ‘Biology in Focus’.Label the structures of the cell membrane (B, C, D, F) and areas next to the cell membrane (A, E, L).

04:16

NameDateLab SectionFill in the Blank The cell membrane is also called the plasma membrane and is made of a phospholipid bilayer. The phospholipids have hydrophilic (water-attracting) heads and two hydrophobic (water-repelling) tails. The head of a phospholipid is made of an alcohol and phosphate group, while the tails are chains of fatty acids. Phospholipids can move laterally and allow water and other molecules to pass through into or out of the cell. This is known as simple diffusion because it does not require ATP and the water or molecules are moving with the concentration gradient. Proteins called integral proteins go all the way through the bilayer, while peripheral proteins are only on one side. Large molecules like ions or carbohydrates use proteins to help move across cell membranes.

Describe the fluid mosaic model of the plasma membrane. Discussthe role of the membrane in the movement of materials through it byeach of the following processes.Active transportPassive transport

Transcript

A cell plasimum membrane is the outermost layer of the membrane and it’s particularly important to the cell, because it provides a fluid layer of protection. Now the plasmum membrane is made up of a few key parts. 1 of them is these lipids arranged in a by lipid layer. So there are the inner phospholipid down at the bottom as shown, and there are outer phospholipid, but all of them are important for adding the fluidity that characteristic fluidity, we think of with the plasmu membrane, around cells. Okay, in addition to these lipids, there are also other structures that make up the plasm membrane 1 of these is the all important channel proteins or the transport proteins. Transport proteins are very important for the movement of different small…

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You are watching: Lab 6: Cell Membranes and Transport Take Notes During the Lab Complete This Worksheet You can read the Background Theory information in the labpad to get definition info. What is the name of the scien. Info created by GBee English Center selection and synthesis along with other related topics.