Campbell Biology (10th Edition)
10th Edition
ISBN: 9780321775658
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Textbook Question
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:…
Example 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.
Chapter 48 Solutions
Campbell Biology (10th Edition)
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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