Release of ____ from the ____ in response to high circulating calcium levels shifts bone metabolism toward net bone formation
A. calcitonin; thyroid gland
B. calcitonin; parathyroid gland
C. parathyroid hormone; parathyroid gland
D. parathyroid hormone; thyroid gland
E. thyroxine; thyroid gland
A
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Your research project involves the characterization of a particular signal transduction pathway. Specifically, you have been studying a receptor tyrosine kinase and protein X, which initiates downstream events. You are certain that protein X is part of the signal transduction pathway, but have been unable to identify a direct protein-protein interaction between the receptor tyrosine kinase and
the protein X. What should you do next in your attempt to identify a link between the receptor tyrosine kinase and protein X? A. Try to identify a coactivator protein. B. Try to identify proteins that act downstream of protein X. C. Try to identify an adapter protein that can interact with both the receptor and protein X. D. Confirm the interaction between the receptor tyrosine kinase and its ligand.
You have severe itching problems when bitten by an insect. Your friend gives you an ointment to spread on your skin around the bite so that the redness and itching do not bother you. The likely mechanism of this medication would be
A. the inactivation of neutrophils. B. to act as an antagonist of histamine. C. the destruction of phagocytic cells. D. the inhibition of lysozyme.
The house fly, Musca domestica, has a haploid chromosome number of 6. How many chromatids should be present in a diploid, somatic, metaphase cell?
What will be an ideal response?
What is the difference between an atom and an element?