KIN 2500 Lecture Notes - Lecture 2: Fluid Mosaic Model, Lipid Bilayer, Cell Membrane

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peachwombat336

4 Sep 2018

School

LSU

Department

Kinesiology: Professional Courses/Basic Activity Courses

Course

KIN 2500

Professor

M.Reid

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Document Summary

All of the cellular contents between the plasma membrane and the nucleus. A large organelle with dna found inside it. Regulated the flow of materials into and out of a cell; allows communication between cells and their external environment. Organelles-found in the cytosol and each have a different function. Chromosomes found within the nucleus contain genes that control cellular structure and function. Structure of a membrane: lipid bilayer the main structure of the plasma membrane, two back to back layers made up of 3 different types of lipid molecules, phospholipids, glycolipids, cholesterol. Goes throughout the membrane: peripheral proteins : not as firmly embedded into the membrane and are attached to membrane lipids or integral proteins. Function of membrane proteins (put the words in the correct blanks) Molecule that binds to a receptor (receptor specific: carriers and transporters- integral proteins that selectively move a polar substance or ion from one side of the membrane to another.

Related Questions

1,Match the descriptions to the type of transport.

- A. B. C.	Water enters a cell because it is hypertonic compared to the extracellular environment, increasing its turgor pressure
- A. B. C.	Water enters guard cells because the guard cells are hypertonic compared to the surrounding cells
- A. B. C.	Potassium ions are pumped into guard cells
- A. B. C.	The motor cells of a Venus fly trap are hypotonic compared to surrounding cells, causing water to leave the motor cells
- A. B. C.	Sugar is loaded into the phloem

A.	Both active and passive transport
B.	Passive Transport
C.	Active transport

2,Describe what is wrong with the following statement and explain why:

All prokaryotic and eukaryotic cells contain plasma membrane, nucleus, ribosomes, organelles, cytoplasm, and cell walls.

What is short-distance transport?

	a,	The movement of solutes from a region of low concentration to a region of high concentration
		b,The movement of water, nutrients, and other substances between cells
c,		The movement of substances from a region of high concentration to a region of low concentration
d,		The movement of water across a semipermeable membrane from a region of low solute concentration to a region of high solute concentration.

What terms describe the movement of water across a semipermeable membrane from a region of high water concentration towards a region of low water concentration (and high solute concentration.)

What is found in the proptoplasm?

Cell wall, cytoplasm, plasma membrane, nucleus, and other cell organelles

Plasmodesmata, cell wall, and plasma membrane

Cell wall, cytoplasm, and plasma membrane

Cytoplasm, nucleus, and other cell organelles

The channels that allow nutrients and protoplasm to pass between plant cells are called _________________.

What happens when a plant cell is placed in a hypotonic solution?

Water will enter the plant cell and the plasma membrane will swell and cell lysis will occur

Water will leave the plant cell and the plasma membrane will pull away from the cell and plasmolysis will occur

Water will enter the plant cell and the plasma membrane will swell and push against the cell wall

Water will leave the plant cell and the plant cell will lose turgor pressure, causing the plant to wilt

________________ transport uses cellular energy.

What molecules make plasma cell membranes hydrophilic on the outside and hydrophobic on the inside?

What type of cells do plants have?

		Bacterial
		Archaeic
		Eukaryotic
		Prokaryotic

NEED HELP FAST!Please write 2 pargragh for each question!

Describe the fluid mosaic model of the plasma membrane and explain how membranes manage to stay fluid with temperature changes. Be sure to explain what the plasma membrane is composed of. How are the sides of a membrane different?

What are membrane proteins and how many types are there? What are their functions?

Define osmosis, diffusion and active transport. Compare and contrast the three. Explain the subtle differences between them. What are the forms of bulk transport in cells?

Starting from the nucleus, work your way all the way out to the ECM and explain each cell organelle IN DETAIL, with labeled diagrams, and their functions. Be sure to include the cytoskeleton and be sure to differentiate between plant and animal cells. (WORTH DOUBLE POINTS)

burgundylion306

1 In our hierarchy of levels of organization (from atom to biosphere), at which level does life begin? Can you relate form to function when it comes to cell structure of a plant cell like Elodea? A thin simple squamous epithelium like in the lining of the lungs? A thicker columnar epithelial layer like that found in the stomach/intestine?

2. Can you remember the architecture of the phospholipid bilayer that makes up the cell membrane? How the 2 phospholipids arrange themselves to form the bilayer? And how you produce a water-proof (hydrophobic) barrier from the bilayer architecture?

3. What are the 3 roles of the plasma membrane? How does the barrier or âfenceâ role of the plasma membrane relate to non-polar vs. polar vs. charged molecules? How does the membrane control the amounts of certain molecules inside the cell? How does this relate to class rule #4? How do cells communicate with one another?

4. How does the plasma membrane help with this function? Which macromolecule is critical to this function? How does this all relate to red blood cells and âA/B/AB/Oâ blood type?

5. Can you explain how the phospholipid bilayer facilitates compartmentalization in a cell? What type of structures are compartmentalized? What is the value of compartmentalization in a cell?

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KIN 2500 Lecture Notes - Lecture 2: Fluid Mosaic Model, Lipid Bilayer, Cell Membrane

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