BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 9, Problem 2U
Signal transduction pathways
a. are necessary for signals to cross the membrane.
b. include the intracellular events stimulated by an extracellular signal.
c. include the extracellular events stimulated by an intracellular signal.
d. are only found in cases where the signal can cross the membrane.
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Signal transduction pathways benefit cells for all of the following reasons except :
a.
they enable different cells to respond appropriately to the same signal.
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they can amplify and diversify a signal.
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they help cells use up phosphate generated by ATP breakdown.
d.
they help cells respond to signal molecules that are too large or too polar to cross the plasma membrane
All cells of a multicellular organism may not respond in the same wayto a particular ligand (signaling molecule) that binds to a cell surfacereceptor. The difference in response may be due toa. the type of receptor for the ligand that the cell expresses.b the affinity of the ligand for the receptor in a given cell type.c. the type of signal transduction pathways that the cell expresses.d. the type of target proteins that the cell expresses.e. all of the above.
Carbon monoxide is a deadly gas. This is due to its quick activation of specific signaling pathways in cells of our body. Since this is a gas, it most likely uses....
Select one:
a. A transmembrane cell surface receptor since it cannot pass through cell membranes
b. A voltage-gated ion channel receptor since it creates a charge when crossing the cell membrane
c. An intracellular receptor since it can easily diffuse across a membrane
Chapter 9 Solutions
BIOLOGY
Ch. 9.1 - Prob. 1LOCh. 9.1 - Prob. 2LOCh. 9.2 - Prob. 1LOCh. 9.3 - Prob. 1LOCh. 9.3 - Prob. 2LOCh. 9.4 - Prob. 1LOCh. 9.4 - Describe how information crosses the membrane in...Ch. 9.4 - Prob. 3LOCh. 9.4 - Prob. 4LOCh. 9.5 - Prob. 1LO
Ch. 9.5 - Prob. 2LOCh. 9 - Paracrine signaling is characterized by ligands...Ch. 9 - Signal transduction pathways a. are necessary for...Ch. 9 - The function of a ____is to add phosphates to...Ch. 9 - Which of the following receptor types is NOT a...Ch. 9 - How does the function of an intracellular receptor...Ch. 9 - Signaling through receptor tyrosine kinases often...Ch. 9 - Prob. 7UCh. 9 - Which of the following best describes the...Ch. 9 - Prob. 1ACh. 9 - The ion Ca2+ can act as a second messenger because...Ch. 9 - Different receptors can have the same effect on a...Ch. 9 - In comparing small G proteins like Ras and GPCR...Ch. 9 - Prob. 5ACh. 9 - The receptors for steroid hormones and peptide...Ch. 9 - Describe the common features found in all examples...Ch. 9 - The sheet of cells that form the gut epithelium...
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- G proteins are involved wheneverA. Binding of messenger molecules to cell surface receptors triggers a target cell response.B. Binding of ligand molecules to cell surface receptors triggers activation or inhibition of enzymes,C. Binding of ligand molecules to cell surface receptors triggers synthesis of second messengers,D. Binding of ligand molecules to cell surface receptors triggers a change.E. All of the above.arrow_forwardA biochemist is designing a new drug that will mimic the shape and function of a particular intercellular signaling molecule. Therefore she must produce a molecule that will bind to the receptor protein and... A. produce a cellular response by altering the Na+/K+ pump located near the receptor site. B. induce a change in the receptor molecule shape, which will ultimately prevent a cellular response. C. induce a change in the receptor molecule shape, which will ultimately produce a cellular response. D. induce a change in the phospholipid bilayer that causes a polar reversal allowing the molecules to be endocytose (engulfed).arrow_forwardIntracellular receptors bind to signaling molecules that are A. anionic. B. cationic. C. nonpolar. D. polypeptides.arrow_forward
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- Match the following description of a cell signal with signal type A. signals across gap junctions B. signal involves a neurotransmitter, short lived C. signal can travel long distances and to many cell types D. communication between neighboring cells, signals short lived E. None of the Above A 1. Paracrine select 2. Direct contact select v 3. Endocrine select - 4. synaptic select 5. Cyclic AMParrow_forwardWhich of the following questions regarding second messengers is false? a. They are needed to mediate the action of nonpolar regulatory molecules. b. They are released from the plasma membrane into the cytoplasm of cells. c. They are produced in response to the binding of regulatory molecules to receptors in the plasma membrane. d. They produce the intracellular actions of polar regulatory molecules.arrow_forwardWhich of the following elements may be in the transduction part of cell signaling? Select one: a. A phosphatase b. A kinase c. cyclin AMP d. ions e. All answers are correctarrow_forward
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