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Q. Explain the sequence of steps by which an action potential propagates without loss. Illustrate a diagram of an axon indicating the site where the peak action-potential currents flow across the membrane. Show the lines of current flow to unexcited parts of the cable. Elucidate how these local currents cause the action potential to propagate.
Sketch the Na+ and K+ currents which flow during an action potential. Look up how gNa and gK vary with time during the action potential -- given in the class notes -- and then recall that INa =gNa(V - VNa) , IK = gK(V-VK), and that the voltage V(t) is varying according to the action-potential shape. You could do this qualitatively, but justify your reply. A common mistake is to confuse the currents that flow throughout the action potential the voltage-clamp currents flow in response to a depolarizing pulse.
If the Federal Reserve adopts a restrictive monetary policy that leads to relatively high interest ratesin United States, what happens to the demand and supply of foreign currency and the dollar's exchange value.
sketch the chromosomes of the parents and the F1. analyse interference and say what you think of its significance.
The opportunity cost of Juan's time is $8 per hour. If Juan receives $2 per pound for his fish, what is the optimal number of hours he should spend fishing.
DNAase is an enzyme that catalyzes the hydrolysis of covalent bonds that join nucleotides together. What will first happen to DNA molecules treated with DNAase.
All farmers in Trivialand are self - employed and sell all of their wares to Super Duper. Elucidate the costs incurred by all of Trivialand's busines.
Which is the ratio of dividing cells to the total number of cells in the sample. Scientists frequently calculate mitotic index to evaluate the growth rates of different types of tissue. Which type of tissue would have a higher mitotic index, normal t..
What is left-sided and right-sided heart failure? Which of these symptoms reflect left-sided heart failure and which reflect right-sided heart failure? Why with reasons.
We operate 300 days per year and have found that an order must be placed with our supplier 6 working days before we can expect to receive that order.
Albinism is a condition that results from the lack of normal pigmentation. In humans, individuals with two recessive alleles at ALBINO (aa) locus are albino.
Calculate Max's marginal utility from snorkeling at each number of hours per day. Does Max's marginal utility from snorkeling obey the principle of diminishing marginal utility.
What changes took place from one group to another. What advantages did each progressive group have over the last? Will you categorize each as more sucessful than the last.
Understand the section on spermatogenesis. Do you think the age of the man is as important in determining the chance of chromosomal abnormalities? Why or why not give reasons.
After verifying that the protein complex was incorporated into liposomes, you put in NADH and incubate at 37°C. You are dismayed to view no color change in the pH indicator dye.
Is this organism recovered more frequently as a nosocomial pathogen, as a community-acquired pathogen, or at similar rates in both settings? Elucidate your choice.
What is the possibility that this child will have red-green color blindness? Figure the cross.
Due to a spinal injury, a patient has lost pain and temperature sensation on the left half of his body from the waist down. Where is his injury? Where will you expect loss of tactile sensation in this patient.
Which is easier to dispose of in a flock of chickens? A recessive allele for erect combs or a dominant allele for feathered legs. How various generations would it take.
Write a scientific review of membrane proteins
What fraction of demes in each set is likely to become fixed for allele A1 versus A2. Explain the differences in head movement available to fish.
Suppose that the breeder selects plants that mature in 69 days for the next generation. Approximation the time required for the next generation to mature. What kind of infection do you believe she has in this hand.
What are advantages and disadvantages or observing living-specimens slides and heat-fixed-specimen slides of microorganisms. Which statements correctly describe the population of wolves.
After some week's plants that were transplanted into nonsterile soil exhibited a much higher growth rate compared to the plants transplanted into sterile soil. What would be the most likely explanation for this result.
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