Anatomy and Physiology by OpenStax
17th Edition
ISBN: 9781506698021
Author: J. Gordon Betts;Dean H. Kruse;Kelly A. Young;Peter DeSaix;Brandon Poe;Oksana Korol;James A. Wise;Eddie Johnson;Jody E. Johnson;Mark Womble
Publisher: XANEDU PUBLISHING
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Textbook Question
Chapter 21, Problem 35RQ
Why do we have natural antibodies?
- We don’t know why.
- immunity to environmental bacteria
- immunity to transplants
- from clonal selection
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Students have asked these similar questions
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 21 Solutions
Anatomy and Physiology by OpenStax
Ch. 21 - Visit this website...Ch. 21 - Visit this website...Ch. 21 - Visit this website...Ch. 21 - Immunity can be acquired in an active or passive...Ch. 21 - Which of the following cells is phagocytic? plasma...Ch. 21 - Which structure allows lymph from the lower right...Ch. 21 - Which of the following cells is important hi the...Ch. 21 - Which of the following cells would be most active...Ch. 21 - Which of the lymphoid nodules is most likely to...Ch. 21 - Which of the following signs is not characteristic...
Ch. 21 - Which of the following is not important in the...Ch. 21 - Enhanced phagocytosis of a cell by the binding of...Ch. 21 - Which of the following leads to the redness of...Ch. 21 - T cells that secrete cytokines that help antibody...Ch. 21 - The taking in of antigen and digesting it for...Ch. 21 - Why is clonal expansion so important? to select...Ch. 21 - The elimination of self-reactive thymocytes is...Ch. 21 - Which type of T cell is most effective against...Ch. 21 - Removing functionality from a B cell without...Ch. 21 - Which class of antibody crosses the placenta in...Ch. 21 - Which class of antibody has no known function...Ch. 21 - When does class switching occur? primary response...Ch. 21 - Which class of antibody is found in mucus? IgM IgA...Ch. 21 - Which enzymes in macrophages are important for...Ch. 21 - What type of chronic lung disease is caused by a...Ch. 21 - Which type of immune response is most directly...Ch. 21 - What is the reason that you have to be immunized...Ch. 21 - Which type of immune response works in conceit...Ch. 21 - Which type of hypersensitivity involves soluble...Ch. 21 - What causes the delay in delayed hypersensitivity?...Ch. 21 - Which of the following is a critical feature of...Ch. 21 - Which of the following is an autoimmune disease of...Ch. 21 - What drug is used to counteract the effects of...Ch. 21 - Which of the following terms means many genes?...Ch. 21 - Why do we have natural antibodies? We dont know...Ch. 21 - Which type of cancer is associated with HIV...Ch. 21 - How does cyclosporine A work? suppresses...Ch. 21 - What disease is associated with bone marrow...Ch. 21 - Describe the flow of lymph from its origins in...Ch. 21 - Describe the process of inflammation in an area...Ch. 21 - Describe two early induced responses and what...Ch. 21 - Describe the processing and presentation of an...Ch. 21 - Describe clonal selection and expansion.Ch. 21 - Describe how secondary B cell responses are...Ch. 21 - Describe the role of IgM in immunity.Ch. 21 - Describe how seroconversion works in HIV disease.Ch. 21 - Describe tuberculosis and the innocent bystander...Ch. 21 - Describe anaphylactic shock in someone sensitive...Ch. 21 - Describe rheumatic fever and how Tolerance is...Ch. 21 - Describe how stress affects immune responses.
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