EBK CAMPBELL BIOLOGY IN FOCUS
2nd Edition
ISBN: 8220101459299
Author: Reece
Publisher: PEARSON
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Chapter 4.2, Problem 2CC
Summary Introduction
To calculate:
The ratio of an elongated cell that measures 125×1×1 arbitrary units. Predict how its surface to volume ratio would compare with reference to the Figure 4.6 “Geometric relationships”, in the textbook.
Introduction:
Surface to volume ratio is also called as surface area to volume ratio and it is denoted by SA:V. The ratio is the “amount of surface area per unit volume of object”.
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;, Consider a spherical cell at body temperature (37°C) that is 10 µm in radius. The concentration of ions inside
and outside the cell are given below. Sodium and potassium are the only permeant ions, and the membrane
contains proteins that pump in 3 sodium ions for every 2 potassium ions pumped out.
[Na*] = ?
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[A] = 121mM
[Na*] = 120mM
[K*] = ?
[Cr] = 125MM
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(a) Suppose the cell is in osmotic equilibrium, find the 3 unknown concentrations.
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(d) Suppose the cell was suddenly placed in distilled water, what would happen to it? And, how much external
pressure (positive or negative) would be needed to prevent this from happening?
If the scale in question #1 above is, instead, 1000.0 um long, and if a hypothetical organ-
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Chapter 4 Solutions
EBK CAMPBELL BIOLOGY IN FOCUS
Ch. 4.1 - Prob. 1CCCh. 4.1 - Prob. 2CCCh. 4.2 - Briefly describe the structure and function of the...Ch. 4.2 - Prob. 2CCCh. 4.3 - What role do ribosomes play in carrying out...Ch. 4.3 - Describe the molecular composition of nucleoli,...Ch. 4.3 - WHAT IF? As a cell begins the process of dividing,...Ch. 4.4 - Describe the structural and functional...Ch. 4.4 - Describe how transport vesicles integrate the...Ch. 4.4 - WHAT IF? Imagine a protein that functions in the...
Ch. 4.5 - Describe two characteristics shared by...Ch. 4.5 - Prob. 2CCCh. 4.5 - Prob. 3CCCh. 4.6 - Prob. 1CCCh. 4.6 - WHAT IF? Males afflicted with Kartageners syndrome...Ch. 4.7 - In what way are the cells of plants and animals...Ch. 4.7 - Prob. 2CCCh. 4.7 - MAKE CONNECTIONS The polypeptide chain that makes...Ch. 4 - Which structure is not part of the endomembrane...Ch. 4 - Which structure is common to plant and animal...Ch. 4 - Which of the following is present in a prokaryotic...Ch. 4 - Prob. 4TYUCh. 4 - Cyanide binds to at least one molecule involved in...Ch. 4 - What is the most likely pathway taken by a newly...Ch. 4 - Which cell would be best for studying lysosomes?...Ch. 4 - DRAW IT From memory, draw two eukaryotic cells....Ch. 4 - SCIENTIFIC INQUIRY In studying micrographs of an...Ch. 4 - FOCUS ON EVOLUTION Compare different aspects of...Ch. 4 - FOCUS ON ORGANIZATION Considering some of the...Ch. 4 - Prob. 12TYU
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