BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 9, Problem 5U
How does the function of an intracellular receptor differ from that of a membrane receptor'
a. The intracellular receptor binds a ligand.
b. The intracellular receptor binds DNA.
c. The intracellular receptor activates a kinase.
d. The intracellular receptor functions as a second messenger
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Paracrine signaling is characterized by ligands that are
a. produced by the cell itself.
b. secreted by neighboring cells.
c. present on the plasma membrane of neighboring cells.
d. secreted by distant cells.
In 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 channels
What type of cell signaling receptor is depicted below
a.
Cytoplasmic Receptor
b.
Transmembrane Receptor
c.
Intracellular Receptor
d.
Nuclear Receptor
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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- Scaffold proteins (a) release kinases and phosphatases into the extracellular fluid (b) bind G proteins to cell membranes (c) increase accuracy but slow signaling cascades (d) organize groups of intracellular signaling molecules into signaling complexes (e) are transcription factors found mainly in plant cellsarrow_forwardwhen a chemical messenger (or ligand) reaches a target cell, it binds to a receptor. A hydrophobic ligand binds to a(n) _______, whereas a hydrophilic ligand binds to a(n)_________. a. agonist receptor; antagonic receptor b. transmembrane receptor; intracellular receptor c. antagonist receptor; agonist receptor d. intracellular receptor; transmembrane receptorarrow_forwarda universal feature of cell signaling receptors is that they? a. undergo a structural (shape) change when the signal molecule is bound b. are present only in the plasma membrane c. are only ion channels d. are protein kinases e. aer only nuclear receptorsarrow_forward
- What is the function of Ras during tyrosine kinase cell signaling? a. It activates the opening of channel-linked receptors. b. It is an enzyme that synthesizes second messengers. c. It links the receptor protein to the MAP kinase pathway. d. It phosphorylates other enzymes as part of a pathway.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_forwardAmplification of a chemical signal occurs when? a. phosphorylation of proteins by protein kinase receptors is balanced by the immediate removal of phosphate groups by phosphatases b. a receptor in the plasma membrane activates several “first messenger” molecules while a signal molecule is bound to it c. a cAMP molecule activates one protein kinase molecule before being converted to AMP d. a receptor activates a single first messenger and a single second messengerarrow_forward
- An 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_forwardWhich receptor undergoes clustering and autophosphorylation in response to activation by a signal? Group of answer choices: a)Ligand-gated ion channels b)Receptor Tyrosine Kinases (RTKs) c)G-Protein Coupled Receptors (GPCRs) d)Nuclear Receptorsarrow_forwardWhat is a key characteristics of a G protein-linked receptors? a. it allows ions to flow through b. it changes confirmation and becomes autophosporylated c. it is a serpentine transmembrane receptor?arrow_forward
- In terms of cell communication, compare and contrast the action of hydrophilic versus hydrophobic ligands (signaling molecules). What type of receptor is used by these ligands? How does each type of ligand influence cell activity?arrow_forwardIn this mechanim of receptor regulation, there is uncoupling of the signaling pathway. Even though the ligand is bound to the receptor located in the plasma membrane, downstream signaling is not occuring. This is best described as: Answers A-D A receptor internalization B receptor desensitization C receptor sensitization 5 D receptor downregulationarrow_forwardG proteins (a) relay a message from an activated receptor to an enzyme that activates a second messenger (b) are GTP molecules (c) terminate cell signaling (d) directly activate protein kinases (e) function as first messengersarrow_forward
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