Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 40.1, Problem 3CC
WHAT IF? Ø Suppose you are standing at the edge of a cliff and suddenly slip, barely managing to keep your balance and avoid falling. As your heart races, you feel a burst of energy, due in part to a surge of blood into dilated (widened) vessels in your muscles and an upward spike in the level of glucose in your blood. Why might you expect that this "fight-or-flight" response requires both the nervous and endocrine systems?
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WHAT IF? Suppose you are standing at the edge of acliff and suddenly slip, barely managing to keep yourbalance and avoid falling. As your heart races, you feela burst of energy, due in part to a surge of blood intodilated (widened) vessels in your muscles and an upwardspike in the level of glucose in your blood. Why mightyou expect that this “fight-or-flight” response requiresboth the nervous and endocrine systems?
20. The figure below shows the pathway through which nitric oxide (NO) triggers smooth muscle relaxation in a blood-
vessel wall. Which of the following situations would lead to relaxation of the smooth muscle cells in the absence of
acetylcholine?
arginine
Answer:
activated.
nerve terminal
-acetylcholine
NO
endothelial cell
RAPID DIFFUSION OF NO
ACROSS MEMBRANES
NO bound to
guanylyl cyclase
GTP
cyclic
GMP
RAPID RELAXATION
OF SMOOTH MUSCLE CELL
smooth muscle cell
A) A smooth muscle cell that has a defect in guanylyl cyclase such that it cannot bind NO
B) A muscle cell that has a defect in guanylyl cyclase such that it constitutively converts GTP to cyclic GMP
C) A muscle cell that has cyclic GMP phosphodiesterase constitutively active
D) A drug that blocks an enzyme involved in the metabolic pathway from arginine to NO
E) None of the above
Explanation:
The fight-or-flight reaction prepares an animal to Pesponu Lu a
threatening situation, by either fighting or running away. One
aspect of this response is changes in blood flow such that the
skeletal muscles and heart receive higher blood flow (vessels
dilate) while digestive organs receive less (vessels constrict). A)
Which signal molecule(s) is/are involved in this response, and
how do they produce these changes in blood vessels?
Briefly explain how this example illustrates how different cells
are able to use the same ligands in different ways.
Chapter 40 Solutions
Campbell Biology
Ch. 40.1 - What properties do all types of epithelia share?Ch. 40.1 - VISUAL SKILLS Consider the idealized animal in...Ch. 40.1 - WHAT IF? Suppose you are standing at the edge of...Ch. 40.2 - MAKE CONNECTIONS How does negative feedback in...Ch. 40.2 - If you were deciding where to put the thermostat...Ch. 40.2 - Prob. 3CCCh. 40.3 - Prob. 1CCCh. 40.3 - Flowers differ in how much sunlight they absorb....Ch. 40.3 - Prob. 3CCCh. 40.4 - If a mouse and a small lizard of the same mass...
Ch. 40.4 - Prob. 2CCCh. 40.4 - Prob. 3CCCh. 40 - Prob. 40.1CRCh. 40 - Is it accurate to define homeostasis as a constant...Ch. 40 - Given that humans thermoregulate, explain why your...Ch. 40 - Why do small animals breathe more rapidly than...Ch. 40 - Level 1: Knowledge/Comprehension 1. The body...Ch. 40 - Prob. 2TYUCh. 40 - Consider the energy budgets for a human, an...Ch. 40 - Prob. 4TYUCh. 40 - Prob. 5TYUCh. 40 - Prob. 6TYUCh. 40 - Prob. 7TYUCh. 40 - Prob. 8TYUCh. 40 - EVOLUTION CONNECTION In 1847, the German biologist...Ch. 40 - SCIENTIFIC INQUIRY Eastern tent caterpillars...Ch. 40 - SCIENCE. TECHNOLOGY. AND SOCIETY Medical...Ch. 40 - WRITE ABOUT A THEME: ENERGY AND MATTER In a short...Ch. 40 - 13. SYNTHESIZE YOUR KNOWLEDGE These macaques...
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- During rhythmic, moderately intense aerobic exercise, there is a redistribution of blood flow throughout the body. Which of the following statements is true? O beta-2 receptors cause dilation and increased blood flow to the exercising muscle there is a large increase in blood flow to the brain to keep you alert mean arterial pressure increases 5-8x due to a similar increase in total cardiac output blood flow to the kidneys and gut increases due to the presence of alpha-2 receptorsarrow_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_forwardIdentify molecule (11) in this diagram which illustrates hormonal regulation (A) phosphodiesterase (B) adenylate cyclase (C) phospholipase C (D) phosphoinositol phosphate (E) protein kinase A (F) protein kinase C (G) inositol triphosphate (H) diacylglycerol (I) calmodulinarrow_forward
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