Name the two myofilaments that make up a sarcomere. Describe…
Name the two myofilaments that make up a sarcomere. Describe the structure of these two filaments in detail. (3 pts) Describe how these two filaments interact to enable a muscle to contract. Discuss what steps need to take place in order for the filaments to interact and how they interact during contraction. (4 pts) Imagine an individual whose skin did not produce vitamin D. Vitamin D is essential for calcium absorption from ingested foods. How would a lack of vitamin D production affect muscle contraction within this individual? (2 pts) A soil bacterium has the ability, under low-oxygen conditions, to release a toxin that causes increased binding of acetylcholine to receptors on the sarcolemma. How might this toxin affect muscles? (1 pt)
Read DetailsExtra Credit: A deceased individual was found on the beach o…
Extra Credit: A deceased individual was found on the beach of the Pacific Ocean. The number of solutes in ocean water (saltwater) is higher than the number of solutes in human cells. Your job is to determine if this individual drowned in the Pacific Ocean or in a body of freshwater with less solutes than human cells (bathtub, pond, lake, etc.). A person who drowned in freshwater but found in saltwater is indication of a potential homicide. During the autopsy, lung cells are found swollen, and many had ruptured (lysed). In what type of water, freshwater or seawater, did the individual drown? Explain how you reached your conclusion for full credit.
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