Osmosis

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cell

Ch.7 Notes and Lecture Date Notes Questions 10/7/15 Unless something there is something non soluble only a helper protein can help it get through Phospholipid Bilayer Endocytosis is when a cell membrane can take/release atoms. Fatty acid tails will not associate with ions Diffusion when high concentration to low concentration Active Transport Learn proteins on the membrane Proteins make membrane selectively permeable 10/8/15 Passive transport, know all forms Diffusion as well Water can pass directly though phospholipid membrane Pores allow passage for chemicals to enter the cell. Diagram, #1 Facilitated diffusion: Use of proteins on the membrane to take in and put out chemicals. Osmosis: diffusion of water through selectively permeable barrier. Diagram 2

lab

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Chemistry

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Gummy bear

Tonicity

Gelatin

Gummi candy

Placing gummy bears into an unknown solution in order to differentiate between hypertonic, hypotonic, and isotonic solutions. Gummy Bear Lab Experiment West Broward High School Biology 1 Honors Submitted by: Anabel Vazquez Blk#4 October 6, 2015 Problem: Are the gummy bears hypertonic, hypotonic, or isotonic to the unknown solution? Research: Hypertonic means that the inside of the gummy bear has a lower concentration of water molecules than the solution, causing water to enter the gummy bear. Hypotonic means that the inside of the gummy bear has a higher concentration of water molecules than the solution, causing water to leave the gummy bear.

Campbell9eChapter7CellStructure

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Na+/K+-ATPase

Facilitated diffusion

Carrier protein

Membrane Structure and Function Chapter 7 Overview: Life at the Edge The plasma membrane is the boundary that separates the living cell from its surroundings The plasma membrane exhibits selective permeability, allowing some substances to cross it more easily than others ? 2011 Pearson Education, Inc. Figure 7.1 Concept 7.1: Cellular membranes are fluid mosaics of lipids and proteins Phospholipids are the most abundant lipid in the plasma membrane Phospholipids are amphipathic molecules, containing hydrophobic and hydrophilic regions The fluid mosaic model states that a membrane is a fluid structure with a ?mosaic? of various proteins embedded in it ? 2011 Pearson Education, Inc. Membrane Models: Scientific Inquiry

AP Bio Chp 7

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AP Reading Guide Chapter 7: Membrane Structure and Function Fred and Theresa Holtzclaw Name_______________________Period___________ Chapter 7: Membrane Structure and Function Concept 7.1 Cellular membranes are fluid mosaics of lipids and proteins 1. The large molecules of all living things fall into just four main classes. Name them. 2. Explain what is meant when we say a molecule is amphipathic. 3. In the 1960s, the Davson-Danielli model of membrane structure was widely accepted. Describe this model and then cite two lines of evidence that were inconsistent with it. 4. Who proposed the fluid mosaic model of membrane structure? When? Describe this model.

quiz 7

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Which of the following statements is NOT true? a. Phospholipids can move laterally in a membrane but rarely move from the extracellular to the intracellular side. b. Plasma membranes are more like a fluid than a solid. c. In a plasma membrane, the hydrophobic portion is oriented to the inside of the membrane. d. Lipid molecules make the cell membrane relatively impermeable to water. e. Saturated phospholipids make a more fluid membrane.

BIO CH 7 TEST

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Facilitated diffusion

Carrier protein

Membrane potential

Tonicity

Lipid raft

Red blood cell

Campbell's Biology, 9e (Reece et al.) Chapter 7 Membrane Structure and Function Membranes and membrane transport are fundamental to cellular life. The concepts in this chapter require integration of concepts from previous chapters: the nature of water and hydrophobic versus hydrophilic molecules, the properties of lipid molecules and their role in regulating membrane fluidity, and the roles of proteins and carbohydrates in membrane function. The concepts of ion transport and electrochemical gradients across membranes are important foundations for the following chapters on energy metabolism. Finally, the bulk transport phenomena have important clinical significance in the immune system, during invasion by pathogens, and in cell signaling. Multiple-Choice Questions

CHEMISTRY NOTES

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Chemistry

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Chemistry of Life Flash Cards http://quizlet.com/13167174/ari-ap-biology-unit-1-the-chemistry-of-life-flash-cards/ Practice Quizzes and Tests http://www.brainbeau.com/index.php/en/ap-biology-online-quizzes-a-tests Macromolecules http://prezi.com/-r8c-fscmffx/ap-bio-chemistry-2-macromolecules/ Atoms, Water and Carbon http://prezi.com/4hefv2hk2bhq/ap-bio-chemistry-1-atoms-water-carbon/ Biochemistry http://classroom.wisd.org/webs/preid/ap_bio_biochemistry_unit.htm Summary of Chemistry http://www.biologycorner.com/APbiology/intro.html Structure and Function of Biological Macromolecules http://www.smcisd.net/webpages/rrandolph/biology.cfm?subpage=17902 Biochemistry Document http://www.cod.edu/people/faculty/fancher/Bio101/Biochem.doc?(document) ?Enzymatic Biochemistry

Water Potential

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matter

Water Potential (?) Water potential (?) is a measure of water?s potential to do work. In order to do work, an object must be able to apply enough force to another object to cause displacement. In order for water to displace another object, water must be moving. The largest water potential any volume of water can have, if only standard atmospheric pressure is being applied to that volume of water, is defined as 0. This is the water potential for distilled water. Distilled water has the greatest potential to move, and thus displace another object.

Problems Water Potential

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health

Practice Problems ? Osmosis and Water potential Use this key to answer all the problems below. If you choose B or C, rewrite the statement so that it is complete and true. A = TRUE B = FALSE C = NOT ENOUGH INFORMATION PROBLEM ONE: The initial molar concentration of the cytoplasm inside a cell is 2M and the cell is placed in a solution with a concentration of 2.5M. Initially, free energy is greater inside the cell than outside It is possible that this cell is already in equilibrium with its surroundings. Initially, solute concentration is greater outside the cell than inside. Water will enter the cell because solute potential is lower inside the cell than outside.

Cell bio chapter 7

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