Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 6, Problem 4TYU
Summary Introduction
Concept introduction: Receptors are large protein or glycoproteins that bind with the signaling molecule (ligand). The cells undergo receptor-ligand alterations and initiate the biological response. The ligand molecule binds with the cell surface receptors.
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G protein–linked receptors (a) inactivate G proteins (b) activate first messengers (c) consist of 18 transmembrane alpha helices (d) have a tail that extends into the cytosol with a binding site for a G protein (e) are located in the cytoplasm or nucleus
This graph shows the electrical charges of the cytosol at one spot along an axon or muscle cell.
a) Even though the charges are the same at steps 3 and 6, explain the situation with the ions on either side of the membrane. I am not looking for a vocabulary term here, just a simple explanation in normal words.
b) At step 6, this spot in the cell is not ready to conduct another action potential/impulse. What has to happen to get it ready again- and how is this done?
Which of the following statements is false?
Question 11 options:
a)
Nucleotides and amino acids can act as extracellular signal molecules.
b)
Some signal molecules can bind directly to intracellular proteins that bind DNA and regulate gene transcription.
c)
Some signal molecules are transmembrane proteins.
d)
Dissolved gases such as nitric oxide (NO) can act as signal molecules, but because they cannot interact with proteins they must act by affecting membrane lipids.
Chapter 6 Solutions
Biology (MindTap Course List)
Ch. 6.1 - Describe the four main processes essential for...Ch. 6.1 - What is the sequence of events that takes place in...Ch. 6.1 - Prob. 2CCh. 6.2 - Compare three types of signaling molecules:...Ch. 6.2 - Prob. 1CCh. 6.2 - Prob. 2CCh. 6.2 - Prob. 3CCh. 6.3 - Identify mechanisms that make reception a highly...Ch. 6.3 - Prob. 4LOCh. 6.3 - Prob. 1C
Ch. 6.3 - Prob. 2CCh. 6.3 - Prob. 3CCh. 6.3 - Prob. 4CCh. 6.4 - Prob. 5LOCh. 6.4 - Trace the sequence of events in signal...Ch. 6.4 - How is an extracellular signal converted to an...Ch. 6.4 - Prob. 2CCh. 6.4 - Prob. 3CCh. 6.5 - Prob. 7LOCh. 6.5 - Prob. 8LOCh. 6.5 - Prob. 1CCh. 6.5 - Prob. 2CCh. 6.5 - Prob. 3CCh. 6.6 - Cite evidence supporting a long evolutionary...Ch. 6.6 - Prob. 1CCh. 6 - During signal transduction (a) the cell converts...Ch. 6 - When a signaling molecule binds with a receptor,...Ch. 6 - G proteinlinked receptors (a) inactivate G...Ch. 6 - Prob. 4TYUCh. 6 - Prob. 5TYUCh. 6 - Calcium ions (a) can act as second messengers (b)...Ch. 6 - When growth hormone binds to an enzyme-linked...Ch. 6 - Scaffold proteins (a) release kinases and...Ch. 6 - Prob. 9TYUCh. 6 - Prob. 10TYUCh. 6 - More than 500 genes have been identified in the...Ch. 6 - Prob. 12TYUCh. 6 - Prob. 13TYUCh. 6 - EVOLUTION LINK Cell signaling in plant and animal...Ch. 6 - EVOLUTION LINK Some of the same G proteinlinked...Ch. 6 - Prob. 16TYU
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