IA MODIFIED MASTERING BIOLOGY WITH E TEX
12th Edition
ISBN: 9780136781752
Author: Urry
Publisher: PEARSON
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Chapter 42.4, Problem 3CC
Summary Introduction
To explain: The reason behind why nitroglycerin is preferred to relieve chest pain and used to treat heart disease patients.
Concept introduction:
Nitroglycerin is used as a vasodilator that opens blood vessels to improve blood flow. Angina results when there is imbalance between the oxygen supply and oxygen demand without a proportional increase in supply. The process of narrowing of arterioles is known as vasoconstriction. The process of relaxation of arterioles is known as vasodilatation.
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One of the molecules listed below is effective in reducing O2 affinity of human Hb in the absence of BPG: (1) Glucose 6-phosphate (2) Inositol hexaphosphate (3) Maleic acid (4) Lactate (5) Arginine - Interestingly, this molecule plays the role of BPG in bird and turtle hemoglobin.
A) Write the chemical structure of each molecule mentioned above.
(B) Predict what molecule is most effective in preventing O2 binding to Hb. In 20 words or less explain the rationale for your prediction
Determin the respiratory exchange ratio of
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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:
Chapter 42 Solutions
IA MODIFIED MASTERING BIOLOGY WITH E TEX
Ch. 42.1 - Prob. 1CCCh. 42.1 - Three-chambered hearts with incomplete septa were...Ch. 42.1 - Prob. 3CCCh. 42.2 - Explain why blood has a higher 02 concentration in...Ch. 42.2 - Prob. 2CCCh. 42.2 - Prob. 3CCCh. 42.3 - Prob. 1CCCh. 42.3 - Prob. 2CCCh. 42.3 - Prob. 3CCCh. 42.4 - Explain why a physician might order a white cell...
Ch. 42.4 - Prob. 2CCCh. 42.4 - Prob. 3CCCh. 42.4 - Prob. 4CCCh. 42.5 - Why is an internal location for gas exchange...Ch. 42.5 - Prob. 2CCCh. 42.5 - MAKE CONNECTIONS Describe similarities in the...Ch. 42.6 - Prob. 1CCCh. 42.6 - Prob. 2CCCh. 42.6 - Prob. 3CCCh. 42.7 - What determines whether O2 and CO2 undergo net...Ch. 42.7 - How does the Bohr shift help deliver O2 to very...Ch. 42.7 - Prob. 3CCCh. 42 - How does the flow of a fluid in a closed...Ch. 42 - Prob. 42.2CRCh. 42 - Prob. 42.3CRCh. 42 - Prob. 42.4CRCh. 42 - Prob. 42.5CRCh. 42 - How does air in the lungs differ from the fresh...Ch. 42 - How are the roles of a respiratory pigment and an...Ch. 42 - Prob. 1TYUCh. 42 - Blood returning to the mammalian heart in a...Ch. 42 - Prob. 3TYUCh. 42 - When you hold your breath, which of the following...Ch. 42 - Prob. 5TYUCh. 42 - Prob. 6TYUCh. 42 - Prob. 7TYUCh. 42 - DRAW IT Plot blood pressure against time for one...Ch. 42 - EVOLUTION CONNECTION One opponent of the movie...Ch. 42 - Prob. 10TYUCh. 42 - Prob. 11TYUCh. 42 - WRITE ABOUT A THEME: INTERACTIONS Some athletes...Ch. 42 - Prob. 13TYU
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