Human Physiology: From Cells to Systems (MindTap Course List)
9th Edition
ISBN: 9781285866932
Author: Lauralee Sherwood
Publisher: Cengage Learning
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Chapter 2, Problem 4SQE
Calculate the number of cells in the body of an average 68-kg (150-lb) adult. (This will only be accurate to about 1 part in 10 but should give you an idea how scientists estimate this commonly quoted number.) Assume all cells are spheres 20 m in diameter. The volume of a sphere can be determined by the equation
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A red blood cell with an intracellular fluid (ICF) concentration of 280 mmol/L, is placed into an environment
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both sides of the membrane, and use 3 of the following 4 terms correctly; hypertonic, hypotonic, lower solute
concentration, higher solute concentrationn (2pts
-Correct use of biological terminology, and correct spelling is essential.
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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*] = ?
[K*] = 119mM
[Ci] = 8mM
[A] = 121mM
[Na*] = 120mM
[K*] = ?
[Cr] = 125MM
[glu] = ?
(a) Suppose the cell is in osmotic equilibrium, find the 3 unknown concentrations.
(b) Suppose the membrane conductance to sodium is 5% that to potassium, find the resting membrane potential
via circuit analysis.
(c) What would the resting potential be if the membrane were instead permeable only to chloride ions?
(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?
The intracellular salt content of a red blood cell is about 150 mM. The cell is put in a 500 mM salt beaker. (a) Describe what will happen to the cell in terms of osmosis if the cell membrane is permeable to water but not to ions. (b) Which direction would solutes diff use if the membrane was permeable to ions: into or out of the cell?
Chapter 2 Solutions
Human Physiology: From Cells to Systems (MindTap Course List)
Ch. 2.1 - State the principles of the cell theory.Ch. 2.1 - Prob. 2CYUCh. 2.2 - State the functions of DNA and the different types...Ch. 2.2 - Prob. 2CYUCh. 2.2 - Prob. 3CYUCh. 2.3 - Prob. 1CYUCh. 2.3 - Discuss the structure and function of a ribosome.Ch. 2.3 - Prob. 3CYUCh. 2.3 - Prob. 4CYUCh. 2.4 - Describe the structure and functions of a Golgi...
Ch. 2.4 - Prob. 2CYUCh. 2.4 - Prob. 3CYUCh. 2.5 - Prob. 1CYUCh. 2.5 - Prob. 2CYUCh. 2.5 - Prob. 3CYUCh. 2.6 - Prob. 1CYUCh. 2.6 - Prob. 2CYUCh. 2.7 - Prob. 1CYUCh. 2.7 - Prob. 2CYUCh. 2.7 - Prob. 3CYUCh. 2.7 - Prob. 4CYUCh. 2.8 - Prob. 1CYUCh. 2.8 - Prob. 2CYUCh. 2.9 - Prob. 1CYUCh. 2.9 - Prob. 2CYUCh. 2.10 - List the three types of cytoskeletal elements and...Ch. 2.10 - Explain how motor proteins transport proteins...Ch. 2.10 - Prob. 3CYUCh. 2.10 - Prob. 4CYUCh. 2 - Prob. 1RECh. 2 - Prob. 2RECh. 2 - Prob. 3RECh. 2 - Prob. 4RECh. 2 - Prob. 5RECh. 2 - Prob. 6RECh. 2 - Prob. 7RECh. 2 - Prob. 8RECh. 2 - Prob. 9RECh. 2 - Using the answer code on the right, indicate which...Ch. 2 - Prob. 11RECh. 2 - Prob. 1UCCh. 2 - Prob. 2UCCh. 2 - Prob. 3UCCh. 2 - Compare exocytosis and endocytosis. Define...Ch. 2 - Prob. 5UCCh. 2 - Compare lysosomes with peroxisomes.Ch. 2 - Distinguish among cellular respiration, oxidative...Ch. 2 - Prob. 8UCCh. 2 - Prob. 9UCCh. 2 - Cells expend energy on what three categories of...Ch. 2 - Prob. 11UCCh. 2 - Prob. 1SQECh. 2 - Prob. 2SQECh. 2 - Prob. 3SQECh. 2 - Calculate the number of cells in the body of an...Ch. 2 - Prob. 5SQECh. 2 - Applying Clinical Reasoning Kevin S. and his wife...Ch. 2 - The stomach has two types of exocrine secretory...Ch. 2 - Prob. 2TAHLCh. 2 - Prob. 3TAHLCh. 2 - Why do you think a person is able to perform...Ch. 2 - Prob. 5TAHL
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