Human Anatomy & Physiology Plus Mastering A&P with Pearson eText -- Access Card Package (11th Edition) (What's New in Anatomy & Physiology)
11th Edition
ISBN: 9780134756363
Author: Elaine N. Marieb, Katja Hoehn
Publisher: PEARSON
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Chapter 11, Problem 2CCS
Nursing Student with Neuropathic Pain
Tamara Costa broke her right tibia and has undergone two separate surgeries to repair it. Although the bone has healed, she suffers increasing pain around the incision sites. The painful area covers the lateral surface of her right leg. She can't stand wearing anything over it or even having a sheet touch it. Her diagnosis is postsurgical neuropathic pain. Pain medication has not helped.
Tamara is a second-year nursing student and has done some reading to try to understand her problem and perhaps find a solution. She has found an article that says neuropathic pain may be caused by a decreased threshold for action potential generation in pain-detecting neurons. However, she has forgotten some of her physiology and needs some help in understanding what she is reading. She has logged into the “Ask a Nurse" chat line–and she got you!
2. Tamara wants to know how a decrease in threshold in pain-detecting neurons would affect their firing. Draw a graph of an intracellular recording of a neuron showing the response to a below-threshold and an above-threshold stimulus. Then, using this graph, show how decreasing the threshold could lead to additional action potentials.
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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:
Chapter 11 Solutions
Human Anatomy & Physiology Plus Mastering A&P with Pearson eText -- Access Card Package (11th Edition) (What's New in Anatomy & Physiology)
Ch. 11 - Prob. 1RQCh. 11 - 2. Match the names of the supporting cells found...Ch. 11 - 4. Assume that an EPSP is being generated on the...Ch. 11 - 5. The velocity of nerve impulse conduction is...Ch. 11 - 6. Chemical synapses are characterized by all of...Ch. 11 - Prob. 5RQCh. 11 - Prob. 6RQCh. 11 - 9. Inhibition of acetylcholinesterase by poisoning...Ch. 11 - 8. The anatomical region of a multipolar neuron...Ch. 11 - 11. An IPSP is inhibitory because (a) it...
Ch. 11 - 12. Identify the neuronal circuits described by...Ch. 11 - 13. Explain both the anatomical and functional...Ch. 11 - 14. (a) Describe the composition and function of...Ch. 11 - 15. (a) What is myelin? (b) How does the...Ch. 11 - 16. (a) Contrast unipolar, bipolar, and multipolar...Ch. 11 - 17. What is the polarized membrane state? How is...Ch. 11 - 18. Describe the events that must occur to...Ch. 11 - 19. Since all APs generated by a given nerve fiber...Ch. 11 - 20. (a) Explain the difference between an EPSP and...Ch. 11 - 21. Since at any moment a neuron is likely to have...Ch. 11 - Prob. 22RQCh. 11 - Prob. 13RQCh. 11 - 25. Briefly describe the three stages of neuron...Ch. 11 - 2. Local anesthetics block voltage-gated Na+...Ch. 11 - 3. When admitted to the emergency room, Sean was...Ch. 11 - 4. Rochelle developed multiple sclerosis when she...Ch. 11 - 5. In the Netherlands a young man named Jan was...Ch. 11 - Nursing Student with Neuropathic Pain Tamara Costa...Ch. 11 - Nursing Student with Neuropathic Pain Tamara Costa...Ch. 11 - Nursing Student with Neuropathic Pain
Tamara...Ch. 11 - Nursing Student with Neuropathic Pain Tamara Costa...Ch. 11 - Nursing Student with Neuropathic Pain Tamara Costa...
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