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Botulinum toxin blocks the release of ACh from the presynaptic axonal terminals of the motor endplate. What would you predict the effects of botulinum poisoning to be on synaptic transmission? Explain using what you know about transmission at chemical synapses. Do you expect this toxin to be lethal? Why?
in order to obtain carbon dioxide for fixation , plants must open the stomata ( typically found on the underside of leaves) On a hot day opening the stomata presents" trade off " for the plant. Explain the trade off involved in keeping the stomata..
Assume you have a stock solution with a concentration of 722g/L. You want to make one liter of solution with a concentration of 39g/L.
Determine the probability of rolling one six sided die and obtaining the following numbers?
A line of mouse cells is growing for many generations in a medium with 15N. cells in G1 are then switched to a new medium that contains 14N.
Prokaryotes rise in number through asexual reproduction, brings in variation in the population through conjugation, transduction and transformation.
What is the difference between octopuses and mussels regarding their circulatory systems? How does that difference influence the mobility of these animals?
What are five major types of symbiosis associated with angiosperms, going back to the start of the eukaryotic line?
Draw the structure of the dipeptide GLY-HIS. What is the charge on the peptide at pH 5.5? And at pH 7.5?
Suppose that the carrying capacity for star-bellied sneetches in the Who-ville forest is 120,000. How many new star-bellied sneetches will be added to an existing population of 15,000 sneetches If the per capita rate of increase is 0.06 per year.
A 20.0 mL sample of gastric juice was taken from a patient suspected of having hypochloridia (low stomach acid). The sample was taken several hours after a meal so there was no ingested food or drink, and it was assumed no buffers were present.
Life cycle of a fern scenario: Hybrid 1- the sperm in the antheridium has 8 chromosomes; dominant gene 'A' is on one of the chromosomes that produce large sporophyte fronds.
When a person's lungs are ventilated by a tank of gas, the technique is known as intermittent positive pressure breathing (IPPB). Analyzing this term, explain how this technique inflates the lungs for inspiration and deflates the lungs are expirat..
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