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You have discovered a new species of antelope that has particularly long legs that you name Dadduus longlegednis. When you examine the motor axons from a number of specimens, you notice that some of them seem to be suffering from some degree of demyelination. You determine that the resting membrane potential is ?70 mV and that the threshold potential is ?55 mV. In addition, you determine that the membrane resistance is 50 ?cm and the internal resistance is 2.5 ?/cm. a. So you first decide to determine how far the next node of Ranvier can be to still allow for the generation of another action potential with a sustained depolarization of 25 mV in a normal neuron. Please explain your answer and (of course) show all work and units. b. How would demyelination affect that number? Please explain your answer. c. What about axon diameter? How does it affect this number? Please explain your answer.
A rare recessive allele inherited in the Mendelian manner, results in the disease Cystic Fibrosis. Assume a man who is phenotypically normal, and whose mother was normal however his father had cystic fibrosis, marries a woman who is also phenotypi..
define which phase of the cell growth or division. In a normal diploid cell, polyploidy can be induced by treatment with colchicine.
A group of Ethiopians were assayed for CCR5-del32 deletion polymorphism. 223 were +/+, 64 were +/del32, and 6 were del32/del32.
Women who are heterozygous for the situation have region of the body that do possess sweat glands while other regions do not and discuss how does this uneven distribution of sweat glands in affected females occur?
In couch potato fleas, pink eyes are dominant to blue eyes and straight wings are dominant to curly. A cross in a homozygous pink eyed, striaght wing female is mated with a blue eyed, curly winged male.
Compute the free energy of transfer involved in the hypothetical transfer of electrons from complex 1 to complex four. The electron reduction potential of complex 1 in -0.32V.
Clarify the difference in their efforts to collect oxygen. Polychaetes have lateral, fleshy parapodia beset with numerous setae, and well developed head appendages such as jaws, tentacles and eyes. What function(s) do you think about parapodia serve.
Think about a population in which the frequency of allele A is p=0.7 and the frequency of allele a is q=0.3, and where the alleles are codominant.
Compute the percentage reduction of bacteria accomplished by pasteurization of the milk sample.
In my junior year of college, I started feeling exhausted and was coughing up a storm. My throat was sore and I had a bad headache. I went to the doctor.
Describe the relationship between biological psychology and other fields in psychology and neuroscience.
Brandon and Jasmine had their 1st baby recently. When the newborn screening results came back, they were shocked to learn their baby had cystic fibrosis.
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