Anatomy & Physiology (6th Edition)
6th Edition
ISBN: 9780134156415
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Chapter 11, Problem 2CCS
Elaine Sawyer, 35, was on her way to the local elementary school with her three children when a bus near her minivan had an accident. the accident on Route 91 occurred. As Mrs. Sawyer swerved to avoid the bus, the right rear corner of her minivan struck the side of the bus, causing the minivan to tip over and slide on its side. Her children were shaken but unhurt. Mrs. Sawyer, however, suffered a severe head injury that caused post-traumatic seizures.
The drugs initially prescribed for her treatment were insufficient to control these seizures. Her doctor additionally prescribed Valium (diazepam), but suggested that she use it only for a month because Valium induces tolerance (loses its effectiveness). After a month of Valium treatment, Mrs. Sawyer no longer had seizures and gradually reduced and eliminated her use of Valium. After being seizure-free for another year, restrictions on her driver’s license were lifted.
Valium enhances inhibitory postsynaptic potentials (IPSPs). What is an IPSP? How does it affect action potential generation?
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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 11 Solutions
Anatomy & Physiology (6th Edition)
Ch. 11.1 - What is meant by integration, and does it...Ch. 11.1 - Which subdivision of the PNS is involved in (a)...Ch. 11.2 - Which type of neuroglia controls the extracellular...Ch. 11.2 - Which two types of neuroglia form insulating...Ch. 11.3 - How does a nucleus within the brain differ from a...Ch. 11.3 - How is a myelin sheath formed in the CNS, and what...Ch. 11.3 - Which structural and functional type of neuron is...Ch. 11.3 - MAKING CONNECTIONS Which part of the neuron is its...Ch. 11.4 - For an open channel, what factors determine in...Ch. 11.4 - Prob. 10CYU
Ch. 11.5 - What determines the size of a graded potential?Ch. 11.6 - Which is bigger, a graded potential or an action...Ch. 11.6 - An action potential does not get smaller as it...Ch. 11.6 - Why does a myelinated axon conduct action...Ch. 11.6 - If an axon receives two stimuli close together in...Ch. 11.7 - Events at a chemical synapse usually involve...Ch. 11.7 - What structure joins two neurons at an electrical...Ch. 11.8 - Which ions flow through chemically gated channels...Ch. 11.8 - Prob. 19CYUCh. 11.9 - Prob. 20CYUCh. 11.9 - Why is cyclic AMP called a second messenger?Ch. 11.10 - Which types of neural circuits would give a...Ch. 11.10 - Prob. 23CYUCh. 11.10 - What pattern of neural processing occurs when we...Ch. 11 - Which of the following structures is not part of...Ch. 11 - Match the names of the supporting cells found in...Ch. 11 - Assume that an EPSP is being generated on the...Ch. 11 - Prob. 3MCCh. 11 - The velocity of nerve impulse conduction is...Ch. 11 - Chemical synapses are characterized by all of the...Ch. 11 - Biogenic amine neurotransmitters include all but...Ch. 11 - Prob. 8MCCh. 11 - Inhibition of acetylcholinesterase by poisoning...Ch. 11 - The anatomical region of a multipolar neuron where...Ch. 11 - An IPSP is inhibitory because (a) it...Ch. 11 - Identify the neuronal circuits described by...Ch. 11 - Explain both the anatomical and functional...Ch. 11 - (a) Describe the composition and function of the...Ch. 11 - (a) What is myelin? (b) How does the myelination...Ch. 11 - (a) Contrast unipolar, bipolar, and multipolar...Ch. 11 - What is the polarized membrane state? How is it...Ch. 11 - Describe the events that must occur to generate an...Ch. 11 - Prob. 19SAQCh. 11 - (a) Explain the difference between an EPSP and an...Ch. 11 - Since at any moment a neuron is likely to have...Ch. 11 - The effects of neurotransmitter binding are very...Ch. 11 - Prob. 23SAQCh. 11 - Prob. 24SAQCh. 11 - Elaine Sawyer, 35, was on her way to the local...Ch. 11 - Elaine Sawyer, 35, was on her way to the local...Ch. 11 - Elaine Sawyer, 35, was on her way to the local...Ch. 11 - Elaine Sawyer, 35, was on her way to the local...Ch. 11 - Elaine Sawyer, 35, was on her way to the local...
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