Human Physiology
15th Edition
ISBN: 9781259864629
Author: Fox, Stuart Ira
Publisher: Mcgraw-hill Education,
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Chapter 18, Problem 4cCP
Explain how gastrin and vagus nerve stimulation cause the parietal cells to secrete HCI.
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Question #3:
In the KeyGene paper, the authors state that it would be useful if pollen from an apomict would
transmit apomixis-inducing genes to the female in the cross (assuming the pollen is viable). Assuming
there was just one gene conferring gametophytic obligate apomixis, and that the two parents are
inbreds, what would be the consequences of such a cross if:
a) The apomixis was a dominant trait? Indicate the genotypes and phenotypes (apomict or non-
apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic
and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female
first (left side) in the parental cross.
b) The apomixis was a recessive trait? Indicate the genotypes and phenotypes (apomict or non-
apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic
and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female
first (left side) in the…
Question #5:
Assume that two genes are identified that confer gametophytic facultative apomixis in soybean. The
genes show independent assortment. Recessive alleles at both loci are required for the facultative
apomixis. Facultative apomixis is triggered when the temperature at pollination is above 20 degrees C.
At temperatures below 20 degrees C, all reproduction is sexual, independent of genotype.
A facultative apomict male, capable of producing viable pollen, was crossed with a sexually
reproducing female. Assuming the parents are completely inbred, what are the predicted phenotypic
ratios (apomict: non-apomict) for the F1, F2, and DH (F1-derived) generations at each of the following
temperatures*:
a) 15°C?
b) 25°C?
*for full credit, show crosses and genotypes where appropriate. Remember to position the
female first (left side) in the cross.
Type your answer here:
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
Chapter 18 Solutions
Human Physiology
Ch. 18 - Prob. 1aCPCh. 18 - Describe the structure and function of the mucosa,...Ch. 18 - Prob. 2bCPCh. 18 - Describe the structure and function of the lower...Ch. 18 - Prob. 3bCPCh. 18 - Prob. 4aCPCh. 18 - Explain how peptic ulcers are produced and why...Ch. 18 - Explain how gastrin and vagus nerve stimulation...Ch. 18 - Describe the adaptations of the small intestine...Ch. 18 - Prob. 6CP
Ch. 18 - Prob. 7CPCh. 18 - Prob. 8aCPCh. 18 - Prob. 8bCPCh. 18 - Prob. 9CPCh. 18 - Prob. 10aCPCh. 18 - Prob. 10bCPCh. 18 - Prob. 10cCPCh. 18 - Prob. 11aCPCh. 18 - Prob. 11bCPCh. 18 - Prob. 12CPCh. 18 - Prob. 13aCPCh. 18 - Describe the mechanisms involved in the intestinal...Ch. 18 - Prob. 14CPCh. 18 - Prob. 15CPCh. 18 - Prob. 16aCPCh. 18 - List each enzyme involved in protein digestion....Ch. 18 - Describe how bile aids both the digestion and...Ch. 18 - Trace the pathway and fate of a molecule of...Ch. 18 - Prob. 17cCPCh. 18 - Which of these statements about intrinsic factor...Ch. 18 - Prob. 2RACh. 18 - Which of these statements about gastric secretion...Ch. 18 - Prob. 4RACh. 18 - Which of these statements about trypsin is...Ch. 18 - Prob. 6RACh. 18 - Prob. 7RACh. 18 - The first organ to receive the blood-borne...Ch. 18 - Prob. 9RACh. 18 - Prob. 10RACh. 18 - Prob. 11RACh. 18 - Which of these statements about vitamin is...Ch. 18 - Which of these statements about starch digestion...Ch. 18 - Prob. 14RACh. 18 - Which of these statements about contraction of...Ch. 18 - Prob. 16RACh. 18 - Prob. 17RACh. 18 - Which of the following statements about the liver...Ch. 18 - Prob. 19RACh. 18 - Prob. 20RACh. 18 - Prob. 21RACh. 18 - Describe the mechanisms that are believed to...Ch. 18 - Prob. 23RACh. 18 - Explain how jaundice is produced when (a) the...Ch. 18 - Prob. 25RACh. 18 - Distinguish between chylomicrons, very-low-density...Ch. 18 - Prob. 27RACh. 18 - Trace the course of blood flow through the liver...Ch. 18 - Prob. 29RACh. 18 - Describe the reflexes controlling the stomach,...Ch. 18 - Prob. 31RACh. 18 - Prob. 32RACh. 18 - Prob. 33RACh. 18 - Prob. 34RACh. 18 - Prob. 35RACh. 18 - Prob. 36RACh. 18 - Prob. 37RACh. 18 - Prob. 38RACh. 18 - Prob. 39RACh. 18 - Prob. 40RACh. 18 - Refer to figure 18. I 4 to answer the following...Ch. 18 - Prob. 42RACh. 18 - Prob. 43RA
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- 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 intervalarrow_forwardWhat percentage of a drug is eliminated after 4 half-lives? Please round to the nearest percent. Show the matharrow_forwardBriefly explain the 6 domain of interprofessional collaboration: Role clarification, Team functioning, Interprofessional communication, Patient/client/family/community-centered care, Interprofessional conflict resolution, Collaborative leadership. Provide a specific negative events that nursing student would observe in a clinical setting for each domain.arrow_forward
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