Campbell Biology (10th Edition)
10th Edition
ISBN: 9780321775658
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 42.5, Problem 3CC
MAKE CONNECTIONS → Describe similarities in the countercurrent exchange that facilitates respiration in fish and thermoregulation in geese (see Concept 40.3).
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Animals often face trade-offs, and one of the goals of modernphysiology is to understand mechanistically why improvementof performance in one way may degrade performance in otherways. In freshwater fish, explain why O2 uptake and Ca2+ uptakeprobably cannot be simultaneously maximized. In other words,why is there a trade-off between the ability to take up O2 and theability to take up Ca2+?
Derivatioh
The equilibrium between dissolved CO2 and carbonic acid can be represented by
k12
H+ + HCO3
H2CO3
k21
k13 || k31
К23
К 32
CO2
H2O
Show that
k23
d[CO2]
= (k31 + k32)[CO2] - (k13 + 3 )tH* I[HCO3¯1
K
dt
where K =
[H+][HCO3¯]/[H2CO3].
Step 1 of 4
The equilibrium between dissolved CO2 and carbonic acid can be represented by
k12
H+ + HCO;
H,CO3
k21
k13
k31
k23
К 32
CO2
H2O
d[CO2]
corresponding to the given equilibrium. (Assume that H2O is incorporated in the appropriate equilibrium constants. Use the following as necessary: [CO2], [H+],
Give the expression for
dt
[HCO3 ], [H2C03], k12, k13, k21, k23, k31, and k32-)
k23 H HCO3
d[CO2]
(k31 + k32)[ CO2] - (kK13 +
k
dt
Submit
Rat heart muscle operating aerobically fills more than 90% of its ATP needs by oxidative phosphorylation. If each gram of tissue consumes O2 at the rate of 12.0 micromol/min, with glucose as the fuel source.
(a) Calculate the rate at which the heart muscle consumes glucose and produces ATP.
(b) Consider an alternate scenario – what would be the rate of consumption if the energy source was a solely triglycerides whose fatty acyl chains were each 14-C in length and saturated? (Assume the O2 consumption rate remains at 12.0 micromol/min)
(c) For a steady-state concentration of ATP of 6.0 micromol/g of heart muscle tissue, calculate the time required (in seconds) to completely turn over the cellular pool of ATP if glucose us used as the sole fuel source. What does this result indicate about the need for tight regulation of ATP production? (Note: Concentrations are expressed as micromoles per gram of muscle tissue because the tissue is mostly water.)
Chapter 42 Solutions
Campbell Biology (10th Edition)
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. 42.4 - Prob. 5CCCh. 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 - Prob. 1CCCh. 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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- . Salmon are anadromous fish and must deal with osmotic changes in their environment in extreme ways. Researchers have found that Na*/K* - ATPase is found in two different kinds of cells in the gill tissue. One type is found in the filament bases that appear to be active when salmon are adults only. The other types of cells are found in the lamellae folds and appear to be active during its juvenile stages. Speculate on these findings as to how this allows salmon to complete their unique life cycle.arrow_forwardIf aerobic respiration in beans experiment were conducted at 0C, what difference would you see in the rate of respiration? Why?arrow_forwardWhen blue crabs living in full-strength seawater swell duringmolting, they take on the H2O that bloats their bodies from theseawater in which they live. They obtain some of the H2O bydrinking. In addition, data show that the activity of Na+–K+-ATPase in their gills increases as they start to swell duringmolting. This rise in ATPase activity suggests that the gillsincrease active transport of ions from the surrounding seawaterinto the blood of the crabs. How could this process help accountfor uptake of H2O?arrow_forward
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