BIOLOGY
12th Edition
ISBN: 9781264839698
Author: Raven
Publisher: MCG CUSTOM
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Chapter 42, Problem 2S
Describe the status of the Na+ and K+ channels at each of the following stages: rising, falling, and undershoot.
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a. What percentage of a drug is eliminated after 4 half-lives? Please round to the nearest percent.
b. What will happen to elimination of the drug in the previous question if the system is saturated? explain and show any math involved
If you wanted to reduce the difference between peak and trough levels that occur with repeated administration of a drug, how would you adjust the dose and dose interval without changing the plateau concentration (plateau is the average of peak and trough levels)? Select your answers for both dose and interval. Hint: It may be helpful to think about this problem using an example such as food. How would you eat if you wanted to maintain very steady hunger/satiety levels without changing your total caloric intake?
Options:
A. Dose; Increase dose
B. Dose; Decrease dose
C. Dose; Do not change dose
D. Interval; Increase the interval between doses (give the drug less frequently)
E. Interval; Decrease the interval between doses (give the drug more frequently)
F. Interval; Do not change the interval
What percentage of a drug is eliminated after 4 half-lives? Please round to the nearest percent. Show the math
Chapter 42 Solutions
BIOLOGY
Ch. 42.1 - Differentiate between subdivisions of the...Ch. 42.1 - Prob. 2LOCh. 42.1 - Explain the roles of the different nervous system...Ch. 42.2 - Contrast the relative concentrations of important...Ch. 42.2 - Prob. 2LOCh. 42.2 - Prob. 3LOCh. 42.3 - Prob. 1LOCh. 42.3 - Prob. 2LOCh. 42.3 - Prob. 3LOCh. 42.4 - Prob. 1LO
Ch. 42.4 - Prob. 2LOCh. 42.4 - Prob. 3LOCh. 42.5 - Describe the organization of the peripheral...Ch. 42.5 - Prob. 2LOCh. 42.5 - Prob. 3LOCh. 42.5 - Prob. 4LOCh. 42 - Data analysis Draw the resulting potentials for...Ch. 42 - Prob. 2DACh. 42 - Which of the following best describes the...Ch. 42 - The ____ cannot be controlled by conscious...Ch. 42 - Prob. 3UCh. 42 - Inhibitory neurotransmitters a. hyperpolarize...Ch. 42 - White matter is ______, and gray matter is...Ch. 42 - During an action potential a. the rising phase is...Ch. 42 - Prob. 7UCh. 42 - Imagine that you are doing an experiment on the...Ch. 42 - The Na+/K+ ATPase pump is a. not required for...Ch. 42 - Prob. 3ACh. 42 - The following is a list of the components of a...Ch. 42 - Prob. 5ACh. 42 - As you sit quietly reading this sentence, the part...Ch. 42 - G proteincoupled receptors are involved in the...Ch. 42 - Tetraethylammonium (TEA) is a drug that blocks...Ch. 42 - Describe the status of the Na+ and K+ channels at...Ch. 42 - Describe the steps required to produce an...Ch. 42 - Prob. 4S
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