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Botulinus toxin causes paralysis. It binds to presynaptic sites at the motor end plate (neuromuscular junction) and prevents the exocytotic release of transmitter from vesicles. Predict the consequences (increase, decrease, no change & explain why) of blocking the release of acetylcholine at the neuromuscular junction on the following: 1. Presynaptic resting potential 2. Presynaptic action potential amplitude 3. Presynaptic Ca2+ influx 4. Presynaptic transmitter release 5. Postsynaptic resting potential 6. Postsynaptic end plate potential 7. Postsynaptic action potential amplitude 8. Postsynaptic action potential frequency 9. Muscle contractile strength
Acquisition of a conjugative plasmid harboring antibiotic resistance genes is one of the easiest ways for bacteria to develop resistance to antibiotics.
Describe the composition of gastric juice, identify the cell types responsible for secreting its components, evaluate the importance of each component in stomach activity, and explain regulation of gastric secretion and stomach motility?
Type in the correct number for each question in the text box provided. Consider the synthesis of one molecule of glucose. How many molecules of ATP are required? Answer How many molecules of NADPH are required? Answer How many turns of the Calvin ..
What does the living microscope specimens, a piece of peacock feather, a sponge, and fern rhizome have in common with the non living specimens, kapok fibers, cotton wool, and sand? What do they have different when looking at them under a microscop..
Determine which types of cells can we derive continuous cell lines? From which types of cells can we? Derive finite cell lines? From which types of cells do we derive mature differentiated cells?
How many nucleotides are translated in the CFTR protein and with regard to the ?F508 mutation: At the DNA level, what specific alteration has occurred? (3 points)
How does the structure of the plasma membrane depend on the structure of the phospholipids molecules? How does this relate to selective permeability?
Epithelial tissue covers all inner and outer: A. surfaces B. spaces C. ears D. nervous systems D. any of the above could be equally valid.
Why does oxygen consumption climb over time during long term, moderate to heavy sub-maximal exercise and what is this phenomenon called?
Describe the reason behind the difference in the physical properties of methane and methanol. Consider the lifestyle in a monastery, how does chant reflect life in the middle Ages.
You have 0.05 mL of an undiluted culture at a concentration of 3.6 x 10^6 CFU/mL. You then add 4.95 mL sterile diluent. What is the dilution, and what is the final concentration of cells?
what is the concentration (%) of solute in the RBC (i.e what is the concentration of all solute molecules combined?) Show your calculations.
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