A patient is admitted to the hospital and given intravenous (IV) fluids. Four hours later, the patient complains that his mouth and eyes feel dry. You notice that he displays signs of dehydration, and when you check his IV, you see that he was given the wrong kind of fluids. Were these fluids likely hypotonic, isotonic, or hypertonic? Explain.
What effect would the hypothetical poison of question 3 have on other functions of the cell? Explain.
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Cellular Functions
Toxicology
Cell Signaling
A popular science fiction program once had an episode that featured an 'intron virus' that 'turned on' the introns in the genes, causing the synthesis of abnormal proteins. The episode may have been entertaining, but its premise had a large flaw about the nature of introns. What was the flaw?
Epithelial cells of the kidneys have pumps that drive the transcellular transport of sodium ions.
The movement of sodium ions drives the transcellular transport of water. Explain why water follows sodium. (Connects to Chapter 3)
What are the two fluid compartments in the body, and how are they kept separate?
Explain how the form of each of the following structures is related to its function:
Intermediate filaments
Write a single sentence, using no more than 25 words, to summarize each of the following cellular processes:
Mitosis
