BIOLOGY(LL)-W/ACCESS CODE >CUSTOM<
12th Edition
ISBN: 9781264058167
Author: Raven
Publisher: MCG CUSTOM
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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.
b.
they can amplify and diversify a signal.
c.
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
A small number of cell surface receptors and low amounts of signals (ligands) can generate a large intracellular response as each step of the signal transduction pathway can be expanded by...
A. gene amplification, i.e. increasing the number of target genes.
B. enzyme-mediated signal amplification, e.g. phosphorylation cascades.
C. the synthesis of new proteins.
D. ATP Synthase, e.g. by building proton (H+) gradients.
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(LL)-W/ACCESS CODE >CUSTOM<
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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- 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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