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1. As a Nursing student in Advanced Human Anatomy, you were able to observe a total hip replacement. While the O.R. personnel where prepping the patient for the surgical procedure, the anesthesiologist assumed (rightly so!) that you had some physiology background. As such, she launched into the following procedural explanation: The patient will need to be intubated, therefore he will be given a single dose of the neuromuscular blocking agent, succinylcholine to provide muscular relaxation during the surgery and to facilitate the insertion of the endotracheal tube. The anesthesiologist asked you the following:
a) Beginning with depolarization at the neuromuscular junction, describe the normal sequence of events which lead to muscle contraction. (10)
b) What prevents acetylcholine (ACh) from accumulating in the neuromuscular junction and causing a sustained contraction in a normal individual? (3)
c) Succinylcholine acts as a depolarizing agent that prevents repolarization of the nerve. Therefore, no further ACh is released until the drug is cleared. Name another site within the neuromuscular junction that might be affected to prevent muscle contraction. (Hint: curare acts by this mechanism) (2)
Biological recognition is significant in many processes explain how the process of recognition occurs while an organism recognizes other members of their own species.
Explain how the cell anatomy of the non-ciliated simple columnar epithelial lining of the small intestines cpmtributes to the overall function of the small intestines.
Think about the two separate experiments. In the first experiment, a DNA strand containing a+ b+ genes were placed in a culture of bacteria with a- b- genes.
Assume that you are working in a research lab and your professor asks you to make a solution of 50X TAE. She asks you to make 1 liter, having 57.1 ml of glacial acetic acid.
Aphids can reproduce sexually and asexually. Females reproduce by themselves and give birth to live females in summer. Describe how the reproductive variability of aphids might be an adaptation that permits them to survive very aggressive predation.
Would you expect Dissolved Oxygen in water taken from the stream entering a lake to be higher or lower than Dissolved Oxygen taken from the lake itself? Give details.
In a population you count 30 red plants, 50 pink plants, and 20 white plants. What are the allele frequencies of the CR and CW alleles in this population.
If given this in this sequence to find surface area, 1 cm x 2 cm x 2 cm block, am I to assume it is written in LxWxH format?
Describing how the brain transmits the message to muscles. Trace impulse, list the steps in as much detail as possible, from which your brain transmits the message to the suitable muscles in order to step up one step.
Assume you are given a test tube containing ten mL of a solution with 6.7 times 109 cells/mL. You are to produce a solution that contains less than 100 cells/mL - but not exactly 100.
Assuming that the virus capsid is spherical, work with your classmates to calculate what is the maximum genome size (in nucleotides) that can fit into the capsid. How long in millimeters would this largest possible RNA genome be?
Unexpectedly, a missense mutation found in a protein-coding gene is no longer causing problems for the cell due to the presence of this mutant tRNA. Before the missense mutation in the protein-coding gene, what was the unique encoded amino acid.
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