Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 9.1, Problem 1SB
What accounts for the specificity of a cellular response to a signal molecule?
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Which of the following happens if the concentration of potassium in the extracellular fluid increases too much?A) Potassium would be taken up by the oligodendrocytes, so no net change in signaaaling would result. B) No signaling could occur. C) The Neuron would become hyperexcitable D) The sodium pumps would immediately fix the situation, so no net change in signaling would result.
Chapter 9 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 9.1 - What accounts for the specificity of a cellular...Ch. 9.2 - Prob. 1SBCh. 9.2 - Prob. 2SBCh. 9.3 - Prob. 1SBCh. 9.3 - Prob. 2SBCh. 9.3 - Prob. 3SBCh. 9.3 - Prob. 4SBCh. 9.3 - Prob. 5SBCh. 9.3 - Prob. 6SBCh. 9.4 - What distinguishes a steroid receptor from a...
Ch. 9.4 - By what means does a specific steroid hormone...Ch. 9.5 - Prob. 1SBCh. 9 - In signal transduction, which of the following is...Ch. 9 - Which of the following could not elicit a signal...Ch. 9 - A cell that responds to a signaling molecule is...Ch. 9 - Prob. 4TYKCh. 9 - Prob. 5TYKCh. 9 - Which of the following is incorrect about pathways...Ch. 9 - Which of the following would not inhibit signal...Ch. 9 - Prob. 8TYKCh. 9 - Prob. 9TYKCh. 9 - Prob. 10TYKCh. 9 - Discuss Concepts Describe the possible ways in...Ch. 9 - Discuss Concepts Is providing extra insulin an...Ch. 9 - Discuss Concepts There are molecules called GTP...Ch. 9 - Discuss Concepts Why do you suppose cells evolved...Ch. 9 - How would you set up an experiment to determine...Ch. 9 - Prob. 16TYKCh. 9 - Prob. 1ITDCh. 9 - Prob. 2ITDCh. 9 - Prob. 3ITD
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- taw a graph representing the changes in membrane potential across the axonal membrane before, during, and after an action potential, On your graph, use a highlighter to clearly indicate for which portions of your graph the letter corresponding to each cellular event listed below belongs. List of cellular events: A) All K* channels open B) All Nat channels close C) The Na*/K* ATPase cotransporter transports Nat and K* across the membrane. D) All Na* channels open E) The threshold value of membrane potential is attained. F) All K* channels close G) Some Nat channels open Your graph: o pe cffectonarrow_forwardAn extracellular signaling molecule binds to cell surface receptor. This cell surface receptor changes shape and activates a trimeric G-protein. What kind of receptor is this? a) Ion-channel coupled receptor b) Receptor Tyrosine Kinase c) G-Protein coupled receptor d) All of the other answers are correct e) Enzyme-coupled receptorarrow_forwardWhat are the sequences of events by which the binding of a chemical messenger to a receptor causes the cell to respond in a specific way?arrow_forward
- When activated extracellularly, G protein-coupled receptors (GPCRs) initiate which of the following? (select all that apply) a G protein signaling mechanism inside the cell. b) A G protein signaling mechanism outside the cell. c) Transporters to uptake degraded neurotransmitters for recycling. d) The release of neurotransmitter molecules into the postsynaptic cell.arrow_forwardWhich 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.arrow_forwardIn intercellular signaling pathways, some receptor proteins can also act as a transcription factor (changing gene expression), because these receptors are ________. A) Group of answer choices B) Intracellular receptors C) Membrane bound receptors D) G protein coupled receptors E) Enzyme linked receptors F) Fast ligand-gated ion channelsarrow_forward
- Describe three types of responses that cells make to signaling molecules.arrow_forwardCan a cell have multiple responses to one stimulus? A) Yes, such as a second messenger activating a kinase and a transcription factor B) No, one stimulus = one response. C) Yes, but only if the stimulus activates two different types of receptors, like a GPCR and a protein kinase receptor at the same timearrow_forwardDefine intracellular signaling.arrow_forward
- Fat-soluble signaling molecules cross the cell membrane; but they affect only the target cells because: A) Only in target cells is the signaling molecule capable of initiating the phosphorylation chain that activates ion channels. B) only target cells have enzymes that break down the signaling molecule C) intracellular receptors are present only on target cells D) only targets have the appropriate DNA segmentsarrow_forwardWhat are the two major mechanisms through which cell signaling leads to a change in cell behavior?arrow_forwardHow do cells signal to each other?arrow_forward
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