Tonicity

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Cell Biology

Cytoskeleton

organelles

cell

Endoplasmic reticulum

Intracellular transport

Unit 2 Info Be aware of support structures in cytoskeleton Microtubules Act as transport feature as well Easily broken down and reformed Microfilaments: Circulation of cytoplasm Intermedia filaments support for cytoskeleton Any shape change involves cytoskeleton All three assist in the change in shape Water potential Depends on solute concentration and pressure Presence of solutes makes water potential lower Pressure can set the potential to zero evening everything out Hypotonic Hypertonic Cis receives the contents in the Golgi Trans transports the contents in the Golgi Rough ER has ribosomes so they construct proteins Smooth ER is making complex carbs and lipids Hormones are made of lipids

Campbell's Biology 9 Edition Chapter 7 Outline

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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.

quiz 7

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cell

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

Problems Water Potential

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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.

campbell_ap_bio_practice_test_ch7

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Integral membrane proteins

Membrane biology

Cell Biology

diffusion

Carrier protein

Chapter?7 Membrane?Structure?and?Function Multiple-Choice?Questions 1) Who?was/were?the?first?to?propose?that?cell?membranes?are?phospholipid?bilayers? A) H.?Davson?and?J.?Danielli B) I.?Langmuir C) C.?Overton D) S.?Singer?and?G.?Nicolson E) E.?Gorter?and?F.?Grendel Answer: E Topic: Concept?7.1 Skill: Knowledge/Comprehension 2) Who?proposed?that?membranes?are?a?phospholipid?bilayer?between?two?layers?of?hydrophilic?proteins? A) H.?Davson?and?J.?Danielli B) I.?Langmuir C) C.?Overton D) S.?Singer?and?G.?Nicolson E) E.?Gorter?and?F.?Grendel Answer: A Topic: Concept?7.1 Skill: Knowledge/Comprehension 3) Who?proposed?that?the?membrane?is?a?mosaic?of?protein?molecules?bobbing?in?a?fluid?bilayer?of?phospholipids? A) H.?Davson?and?J.?Danielli B) I.?Langmuir C) C.?Overton

AP biology review chapter 6 and 7

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cell

Vesicle

Turgor pressure

Golgi apparatus

Lysosome

DO NOT WRITE ON THIS TEST- USE ANSWER DOCUMENT FORM: A 1 AP Biology-Chapter #6 & 7 Review Multiple Choice Identify the choice that best completes the statement or answers the question. 1. All of the following are part of a prokaryotic cell except a. DNA. b. a cell wall. c. a plasma membrane. d. ribosomes. e. an endoplasmic reticulum. 2. The volume enclosed by the plasma membrane of plant cells is often much larger than the corresponding volume in animal cells. The most reasonable explanation for this observation is that a. plant cells are capable of having a much higher surface-to-volume ratio than animal cells. b. plant cells have a much more highly convoluted (folded) plasma membrane than animal cells. c. plant cells contain a large vacuole that

Chapter 7: Cellular Structure and Function

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Biological membrane

Chapter 7: Cellular Structure and Function THE CELL THEORY -All organisims are composed of one or more cells -The cell is the basic unit of structure and organization of organisms -All cells come from pre-existing cells PROKARYOTIC CELL -Simple structure -Contains a plasma membrane -Does not contain membrane bound organelles EUKARYOTIC CELL -Contains a plasma membranre -Contains membrane-bound organelles PLASMA MEMBRANE -Thin, flexible boundary between the cell and its enviornment -Allows nutrients into the cell -Allows waste to leave the cell SELECTIVE PERMEABILITY -The plasma membrane controls the movement of substances into and out of the cell -The plasma membrane is composed of the phospholipid bilayer FLUID MOSAIC MODEL

biology

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cell