Anatomy & Physiology (6th Edition)
6th Edition
ISBN: 9780134156415
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Textbook Question
Chapter 3.6, Problem 1CYU
What term is used to indicate signaling chemicals that bind to membrane receptors? Which type of membrane receptor is most important in directing intracellular events by promoting formation of second messengers?
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Chapter 3 Solutions
Anatomy & Physiology (6th Edition)
Ch. 3.1 - Summarize the four key points of the cell theory.Ch. 3.1 - How would you explain the meaning of a generalized...Ch. 3.2 - What basic structure do all cellular membranes...Ch. 3.2 - What is the importance of the glycocalyx in cell...Ch. 3.2 - Prob. 3CYUCh. 3.2 - Phospholipid tails can be saturated or unsaturated...Ch. 3.3 - What is the energy source for all types of...Ch. 3.3 - What determines the direction of any diffusion...Ch. 3.3 - What are the two types of facilitated diffusion...Ch. 3.4 - What happens when the Na+-K+ pump is...
Ch. 3.4 - As a cell grows, its plasma membrane expands. Does...Ch. 3.4 - Prob. 3CYUCh. 3.4 - Which vesicular transport process allows a cell to...Ch. 3.5 - What process establishes the resting membrane...Ch. 3.5 - Is the inside of the plasma membrane negative or...Ch. 3.6 - What term is used to indicate signaling chemicals...Ch. 3.7 - Which organelle is the major site of ATP...Ch. 3.7 - What are three organelles involved in protein...Ch. 3.7 - Compare the functions of lysosomes and...Ch. 3.7 - How are microtubules and microfilaments related...Ch. 3.7 - Prob. 21CYUCh. 3.8 - Prob. 22CYUCh. 3.9 - If a cell ejects or loses its nucleus, what is its...Ch. 3.9 - What is the role of nucleoli?Ch. 3.9 - What is the role of nucleoli?Ch. 3.10 - If one of the DNA strands being replicated reads...Ch. 3.10 - During what phase of the cell cycle is DNA...Ch. 3.10 - What are three events occurring in prophase that...Ch. 3.11 - Codons and anticodons are both three-base...Ch. 3.11 - How do the A, P, and E ribosomal sites differ...Ch. 3.11 - What is the role of DNA in transcription?Ch. 3.12 - What is the importance of ubiquitin in the life of...Ch. 3.12 - Prob. 2CYUCh. 3 - The smallest unit capable of life by itself is (a)...Ch. 3 - Prob. 2MCCh. 3 - Prob. 3MCCh. 3 - The term used to describe the type of solution in...Ch. 3 - Osmosis always involves (a) a selectively...Ch. 3 - Prob. 6MCCh. 3 - Prob. 7MCCh. 3 - The endocytotic process in which a sampling of...Ch. 3 - Prob. 9MCCh. 3 - The nuclear substance composed of histone proteins...Ch. 3 - The information sequence that determines the...Ch. 3 - Mutations may be caused by (a) X rays, (b) certain...Ch. 3 - The phase of mitosis during which centrioles each...Ch. 3 - Final preparations for cell division are made...Ch. 3 - The RNA synthesized on one of the DNA strands is...Ch. 3 - The RNA species that travels from the nucleus to...Ch. 3 - If DNA has a sequence of AAA, then a segment of...Ch. 3 - A nerve cell and a lymphocyte are presumed to...Ch. 3 - Prob. 19MCCh. 3 - Explain why mitosis can be thought of as cellular...Ch. 3 - Contrast the roles of ER-bound ribosomes with...Ch. 3 - Cells lining the trachea have whiplike motile...Ch. 3 - Name the three phases of interphase and describe...Ch. 3 - Comment on the role of the sodium-potassium pump...Ch. 3 - Differentiate between primary and secondary active...Ch. 3 - Cell division typically yields two daughter cells,...
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- Outline the three general means by which binding of a water soluble extracellular chemical messenger to its matching surface membrane receptor brings about the desired intracellular response.arrow_forwardWhen 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_forwardCompare/contrast intercellular vs. Plasma membrane receptors. Where is each receptor located and what type of signal molecule binds to each receptor?arrow_forward
- What are the three steps by which receptor tyrosine kinases typically convey an extracellular signal to another intracellular enzyme?arrow_forwardDescribe the process of Signaling by Receptors That Are Ligand-Gated IonChannels?arrow_forwardClassify each phrase as describing ligand-gated ion channels, voltage-gated ion channels, or both. Ligand-gated ion channels a form of passive transport Voltage-gated ion channels include the acetylcholine receptor change conformation in response to changing membrane potential Answer Bank may participate in an action potential Both change conformation in response to a signal molecule bindingarrow_forward
- Intracellular signaling pathways provide multiple opportunities for the amplification of a response to an extracellular signal. Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a True Falsearrow_forwardHow does a receptor “know” which signaling molecules to bind?arrow_forwardtaw 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_forward
- Which statement best describes the interaction that occurs as a result of the binding of a ligand to a ligand-gated ion channel receptor? A B с D ligand extracellular environment gate closed inactive ligand-gated ion channel receptor ions The process permanently opens or closes the ion channel. cytoplasm The process alters the membrane potential by changing the intracellular ionic concentration. The process causes G proteins to bind with GTP and become activated. The process removes three sodium ions from the cell and brings in two potassium ions.arrow_forwardNitric oxide produced by the endothelial layer of blood vessels stimulates the smooth muscle layer underneath to relax, leading to widening of blood vessel lumen and subsequent decrease in blood pressure. This type of cellular communication between endothelial and smooth muscle cells is an example of what type of chemical signaling?arrow_forwardSuppose that a G protein undergoes a mutation that allows the exchange of bound GTP for GDP to occur in the absence of G protein binding to a receptor. How might this mutation affect signaling involving a GPCR? Which subunit of the G protein is most likely affected by the mutation?arrow_forward
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