Campbell Biology: Australian And New Zealand Edition + Mastering Biology With Etext
11th Edition
ISBN: 9781488687075
Author: Lisa, A. Urry
Publisher: PEARSON
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Textbook Question
Chapter 7.3, Problem 2CC
WHAT IF? Ø If a Paramecium swims from a hypotonic to an isotonic environment, will its contractile vacuole become more active or less? Why?
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If a Paramecium was to swim from a hypotonic environment to an isotonic one, what will change in the activity of its contractile? vacuole
Chapter 7 Solutions
Campbell Biology: Australian And New Zealand Edition + Mastering Biology With Etext
Ch. 7.1 - VISUAL SKILLS Carbohydrates are attached to...Ch. 7.1 - WHAT IF? How would the membrane lipid composition...Ch. 7.2 - What property allows O2 and CO2 to cross a lipid...Ch. 7.2 - VISUAL SKILLS Examine Figure 7.2. Why is a...Ch. 7.2 - MAKE CONNECTIONS Aquaporins exclude passage of...Ch. 7.3 - How do you think a cell performing cellular...Ch. 7.3 - WHAT IF? If a Paramecium swims from a hypotonic...Ch. 7.4 - Sodium-potassium pumps help nerve cells establish...Ch. 7.4 - VISUAL SKILLS Compare the sodium-potassium pump...Ch. 7.4 - MAKE CONNECTIONS Review the characteristics of...
Ch. 7.5 - As a cell grows, its plasma membrane expands. Does...Ch. 7.5 - DRAW IT Return to Figure 7.9, and circle a patch...Ch. 7.5 - Prob. 3CCCh. 7 - In what ways are membranes crucial to life?Ch. 7 - How do aquaporins affect the permeability of a...Ch. 7 - What happens to a cell placed in a hypertonic...Ch. 7 - ATP is not directly involved in the functioning of...Ch. 7 - Which type of endocytosis involves the binding of...Ch. 7 - In what way do the membranes of a eukaryotic Cell...Ch. 7 - According to the fluid mosaic model of membrane...Ch. 7 - Which of the following factors would tend to...Ch. 7 - Which of the following processes includes all the...Ch. 7 - Prob. 5TYUCh. 7 - DRAW IT An artificial "cell" consisting of an...Ch. 7 - EVOLUTION CONNECTION Paramecium and other...Ch. 7 - Prob. 8TYUCh. 7 - SCIENCE, TECHNOLOGY, AND SOCIETY Extensive...Ch. 7 - WRITE ABOUT A THEME: INTERACTIONS A human...Ch. 7 - SYNTHESIZE YOUR KNOWLEDGE In the supermarket,...
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- # 27: What is the specific name given to these organism's thickened plasma membrane? #28: What is the function of the red structure at the tip of the arrows.arrow_forwardWhat Osmotic conditions would be favored by Plant and Animal cells? Why? Explain what is meant by the Fluid Mosaic Model of Membrane Structure. What are the various functions of membrane proteins? Explain the different forms of membrane transport: Passive, Facilitated, Active. Describe the bulk transport mechanisms of Endocytosis and Exocytosis.arrow_forwardQ1: In what ways is the plasma membrane a barrier, and in what ways is it a gatekeeper? Q2: Why can’t ions (such as Na+) cross the plasma membrane without the help of a transport protein? Q3: If no energy were available to the cell, what forms of transport would not be able to occur? What forms of transport could occur?arrow_forward
- (a)Aquaporins and membrane channel protein in plant and animal,they permit the movement of water across the membrane.Explain why this is necessary.(b) Explain the importance of cell surface membrane to cellarrow_forwardMatch the transport mechanisms with their descriptions. (1) diffusion (2) facilitated diffusion (3) filtration (4) active transport (5) endocytosis (6) exocytosis A. the cell membrane engulfs a particle or substance, drawing it into the cell in a vesicleB. movement down the concentration gradient with a carrier protein, without energy inputC. movement down the concentration gradient without a carrier protein or energy inputD. a particle or substance leaves a cell in a vesicle that merges with the cell membraneE. movement against the concentration gradient with energy inputF. hydrostatic pressure forces substances through membranesarrow_forwardAccording to ‘Contriving Decent Demonstrations’ section of Vogel (1994), what is the connection between molecular diffusion at the level of the cell and multicellular complexity at the level of the organism?(Please according to Vogel (1994)) in 2 to 3 sentencesarrow_forward
- The diagram below shows a tank system consisting of 3 compartments (A, B and C) and 2 membranes (X and Y) set up to study osmolarity and tonicity. The membrane permeabilities are shown in the table. Compartment A is filled with a solution of 300 mM Sucrose. Compartment B is filled with a solution of 100 mM CaCl, Compartment C has a solution of 300 mM Urea. The volumes in each compartment are the same at the beginning of the experiment. A Membrane X Membrane Y P 0 NA X B Po 0 0 Purs 0 100 11 11 11 II II II 11 11 11 II II II Y 10000 10000arrow_forwardOr. Foyez Samar The volume enclosed by the plasma membrane of plant cells is often much larger the c corresponding volume in animal cells. The most regsengble 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 cens. C) plant cells contain a large vacuole that reduces the volume of the cytoplasm. D) animal cells are more spherical, whereas plant cells are elongated. 12 A uarrow_forward6arrow_forward
- Model 4 - Transport Proteins: Facilitated Diffusion Extracellular Fluid mu Cytoplasmic Fluid Extracellular Fluid wwwwwwy hmmmml Cytoplasmic Fluid www.wmy wwwwwy hummu hmm wwwwwwy immmml wwwwwwwwY immu hmmmml wwwwy hmmmm O wwwwwwy wwwwwwwy imm hmmmmm Y www Y www 10. What appears to be the effect of inserting a protein channel into the membrane on the movement of molecules across the membrane? 11. Is the inner surface (facing the channel) of the embedded protein likely to be polar or nonpolar in the examples shown in Model 4? Is the exterior surface (facing the fatty acid chains of the phospholipids) of the embedded protein likely to be polar or nonpolar? Explain your reasoning. When a membrane protein assists in the passive transport of molecules across a barrier in the direction down their concentration gradient (from high concentration to low concentration) it is called facilitated diffusion. Transport proteins may also be involved in active transport where the cell uses energy from…arrow_forwardQ1/ What is the relation between concentration gradient with Active & * ?passive transport إضافة ملفarrow_forwardView Acrobat Q Tell me A A Aa v Ao 11 - ab x, x A A v 三===|m。|av田。 Styles Styles Pane Dic. Identify the following as Active or Passive transport. (A. Active B. Passive) 1. Diffusion 2. Requires energy 3. Facilitated transport 4. Movement against concentration gradient Match the following tonicities with the correct description 5. Water concentration equal to that of the cell A. Hypertonic B. Isotonic 6. Solute concentration greater than the cell C. Hypotonic 7. Causes turgor pressure in plant cells 8. Net Movement of water into the cellarrow_forward
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