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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Chapter 48.2, Problem 3CC
MAKE CONNECTiONS → Review Figure 7.10, which illustrates the diffusion of dye molecules across a membrane. Could diffusion eliminatethe concentration gradient of a dye that has a net Charge? Explain.
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Or. 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 u
Molecular Transport Across Membranes Workshop
How does the cell membrane control movement of materials?
The cellular membrane is critical to the maintenance of homeostasis in living
organisms. The cell membrane separates the cell from the external environment and
plays a critical role in regulating movement of material in and out of the cell.
Additionally, eukaryotic cells are made complex by the presence of internal
membranes that form organelles, so the cells may become specialized. These organelle
membranes create compartments within the cell that can do specific functions.
For this exercise, you will work in groups of four to progress through the activities.
At the end of each activity, one group (chosen at random) will share how they
responded and open the floor for further discussion.
Model 1 - Types of Ions and Molecules in a Cell
Type 4 Molecules
Molecular oxygen (O,):
Туре 1 Ions
Type 2 Molecules
Туре 3 Molecules
Glucose:
Water:
Potassium: K*
OH
0=0 D
Sodium: Na+ +
O-
Urea:…
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Chapter 48 Solutions
Campbell Biology: Australian And New Zealand Edition + Mastering Biology With Etext
Ch. 48.1 - Prob. 1CCCh. 48.1 - Describe the basic pathway of information flow...Ch. 48.1 - WHAT IF? How might increased branching of an axon...Ch. 48.2 - Under what circumstances could ions flow through...Ch. 48.2 - WHAT IF? Suppose a cell's membrane potential...Ch. 48.2 - MAKE CONNECTiONS Review Figure 7.10, which...Ch. 48.3 - How do action potentials and graded potentials...Ch. 48.3 - In multiple sclerosis (from the Greek skleros,...Ch. 48.3 - How do both negative and positive feedback...Ch. 48.3 - WHAT IF? Suppose a mutation caused gated sodium...
Ch. 48.4 - Prob. 1CCCh. 48.4 - Some pesticides inhibit acetylcholinesterase, the...Ch. 48.4 - Prob. 3CCCh. 48 - How would severing an axon affect the flow of...Ch. 48 - Suppose you placed an isolated neuron in a...Ch. 48 - Prob. 48.3CRCh. 48 - Prob. 48.4CRCh. 48 - Level 1: Knowledge/Comprehension 1. What happens...Ch. 48 - Level 1: Knowledge/Comprehension 1. What happens...Ch. 48 - Where are neurotransmitter receptors located? (A)...Ch. 48 - Why are action potentials usually conducted in one...Ch. 48 - Which of the following is the most direct result...Ch. 48 - Suppose a particular neurotransmitter causes an...Ch. 48 - WHAT IF? Ouabain, a plant substance used in some...Ch. 48 - Prob. 8TYUCh. 48 - DRAW IT Suppose a researcher inserts a pair of...Ch. 48 - EVOLUTION CONNECTION An action potential is an...Ch. 48 - Prob. 11TYUCh. 48 - WRITE ABOUT A THEME: ORGANIZATION In a short essay...Ch. 48 - Prob. 13TYU
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- Multipass transmembrane proteins synthesized by ribosomes on the rough endoplasmic reticulum generally have which of the following arrangements of start-transfer and stop-transfer signals? multiple start signals and multiple stop signals (to allow multiple transmembrane regions) multiple start signals, but only one stop signal (to allow only one transmembrane region) only one start signal, but multiple stop signals (to allow only one transmembrane region) only one start signal, and only one stop signal (to allow only one transmembrane region) only one stop signal, and only one start signal (to allow only one transmembrane region)arrow_forwardExample Problem: FRAP Data Interpretation The diffusion rate of four different membrane proteins (A, B, C, and D) was measured using a FRAP experiment with purified liposomes. The FRAP recovery curves are shown below. Fluorescence intensity ROI A 3 Time Pre-bleaching Bleaching imaging imaging B Time Post-bleaching imaging C Time D Time (a) Which membrane protein exhibits the higher rate of diffusion in the lipid bilayer? A or B? C or D? (b) Explain the most likely cause of the difference in the recovery curves for proteins A and C.arrow_forwardDon't use Ai and chatgpt. Answer in step by step with explanation.arrow_forward
- please choose correct letter and explain a bit 1. The strongest way by which a protein can maintain its shape is by using:a) ionic bonds b) disulfide bonds c) star war forces d) van der Waals forces 2. If a cell (like an amoeba) would be capable of migrating from one place to another only with movement created from the inside of the cell, then we can say that that movement is done mainly by: a) glycoproteins b) feet c) microtubules d) actin filaments True or False: In eukaryotic cells (such as human cells), the variety and diversity of proteins is much less than the variety and diversity of lipids.arrow_forwardOsmosis Practice Activity Osmosis is the diffusion of water from an area of high concentration to an area of low concentration. Only water moves in osmosis! The diagrams below show the concentration of water and salt inside the cell and the concentration of water and salt surrounding the cell. Complete the sentences below by comparing the concentration of the water inside the cell and the concentration outside the cell. 1. a. Water will flow the cell, out of the cell, in both directions). (into 5% NaCl 95% H20 95% NaCI 5% H20 b. The cell will (shrink, burst, stay the same). a. Water will flow (into the cell. 2. 5% NaCl out of the cell, in both directions). 5% NaCl 95% H20 95% H20 b. The cell will (shrink, burst, stay the same).arrow_forwardasap please.arrow_forward
- please helparrow_forwardThe diffusion rate of four different membrane proteins (A, B, C, and D) was measured using a FRAP experiment with purified liposomes. The FRAP recovery curves are shown below. (a) Which membrane protein exhibits the higher rate of diffusion in the lipid bilayer? A or B? C or D? (b) Explain the most likely cause of the difference in the recovery curves for proteins A and C.arrow_forwardTransport Across the Cell Membrane Worksheet 1. For each of the following examples, state whether the solution is isotonic, hypertonic or hypotonic and draw an arrow to indicate which way water will move. a) b) 100% H₂O 10% NaCl 0% NaCl 90% H₂O 83 5% salt 10% saltarrow_forward
- Osmosis Pre-Lab Question Research the structures that protect plant and animal cells from damage resulting from osmotic pressure. Write a few sentences explaining what they are, how they work, and where they are located.arrow_forwardModel 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_forwardTONICITY DRAG THE WORDS INTO THE BLANK SPACES BEL@W TO ACCURATELY COMPLETE THE PARAGRAPH Hypertonic Isotonic Hypotonic Hypertonic Lsotonic Hypotonic animal cell plant cell A Above are a represented plant cell and an animal cell. Refer to the key on slide 5 and fill in the blanks below. (If you find yourself counting solute dots, you're working much too hard!) Assume that the cell membranes are allow only water (not the solutes) to pass through. Because the cytoplasms of the plant and the animal cell have equal concentrations of solutes, we can say that their cytoplasms are to each other. If we put both the plant and the animal cells into Solution A, we would expect no change in the cells, because Solution A is to the cytoplasm of each cell.arrow_forward
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