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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.
Which food item would cook the fastest and why with reason. What are the similarities between G-protein receptor systems and Tyrosine-kinase receptor systems.
What would your expected results be (growth or no growth) if you transformed bacteria with a plasmid that had ampicillin and kanamynic (another antibiotic) resistance and plated them. Situation growth or no growth and explain your reply.
What techniques would you utilize to detect this DNA sequence. Mechanical stress or trauma frequently triggers the symptoms of gouty arthritis in susceptible people. In this view elucidate why gouty arthritis affects the great toe more commonly than ..
How various ATP equivalents are required to synthesize de novo one molecule of IMP, starting from ribose-5-phosphate? Presume that all required precursors in the pathway are present.
What phenotypes will you suppose among the 1024 offspring, and how many of each phenotype would you expect.Suppose that a cross is made between a fly with normal wings.
In an experiment you are studying a neuron that receives synaptic inputs from two other neurons: one from neuron A and one from neuron B. Illustrate a separate graph for each value of Vm.
Tina is consuming 12 mg of iron per day. Her RDA is 15 mg. She has no condition warranting a greater-than-normal need for iron. Which of the statements is true about her consumption of this nutrient.
Illustrate what is meant by motivation. What types of non-financial reward might a company employ to motivate employees.
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.
What is Spock's genotype? What is Spock's wife's genotype? What percentage of their offspring would have the similar phenotype as Spock.
What is the most possible explanation. Cultures from dialysate concentrate and the internal areas of the dialysis machines were negative; iodophor from a small in- use plastic container yielded a pure culture of P. aeruginosa. What improper method le..
Most of us can't even imagine a world without oxygen. Though, as you learned earlier, chemically oxygen is a powerful oxidizing compound. What effect(s) would the increase in oxygen levels of atmosphere have on the organisms that existed at that time..
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