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Dogs are extremely susceptible to poisoning by theobromine from chocolate, but only extreme doses complicate humans. Below are the oral LD50s:
LD50 half life
Dog 300 mg/kg 17 hr
Human 1200 mg/kg 2 hr
Given the data, provide a plausible explanation of why the half-life and LD50 are so different for this toxicant (limit 3-4 sentences)
Present the major categories of drugs known to affect hormonal balance and briefly describe the difference between ovarian and androgenic steroids.
Report on a new discovery in diabetes.
Discuss using examples the effects of reversible andnon-reversible inhibitors on enzyme activity. Explain why a genetic defect that affects only one enzymein a metabolic pathway can have serious consequences. Explain the role of vitamins in metabolic..
What was the importance of Svedberg's work in terms of the understanding of the nature of proteins?
germination of fern spores does not require mRNA synthesis for protein synthesis. Propose a mechanism that would allow germination without mRNA synthesis in the spore.
How can an animal's body form be influenced by its niche?? Provide an example. Why and how does composition and temperature affect membrane fluidity?
Tropical rainforests are already being destroyed at a very rapid rate. Imagine if this rate were further accelerated, for example, by highly exploitative, rapid land-clearing policies in the Amazon or SE Asia. What would be the expected effects of..
In the species Cerebrum gigantus, purple eyes (y) are recessive to yellow eyes (Y) and green hair (b) is recessive to blue hair (B). One parent who is homozygous dominant for yellow eyes and heterozygous hair color has found a mate who is homozygo..
case studa friend from high school who you had not seen for 5 years moved into your neighborhood. although you were
A mutant form of aphid, the klutzid, inserts its stylet into the vessel element of xylem. What materials are found in the fluids of xylem? Could an aphid live on xylem fluid? Would xylem fluid flow into the aphid? Why or why not?
which has the larger amount? If you could explain so that I may better understand the concept, this would be great as well.
Describe three age-related changes in the skin that would account for the decreased ability of the elderly to maintain body temperature homeostasis.
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