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Endocrine System 1. Why are organs such as the kidneys, stomach, heart, and skin considered part of the endocrine system? 2. Why are target cell receptors important? 3. Chemically, what types of molecules are hormones? 4. What are the general ways in which blood hormone levels are regulated? 5. In what respect is the pituitary gland actually two glands? 6. How do hypothalamic releasing and inhibiting hormones influence secretions of anterior pituitary hormones? 7. How is the secretion of T3 and T4 regulated? What are the actions of the thyroid hormones and calcitonin? 8. How is secretion of PTH regulated? 9. In what ways are the actions of PTH and calcitriol simi- lar? How do they differ? 10. What are the functions of insulin? 11. How are blood levels of glucagon and insulin controlled? 12. How do the adrenal cortex and adrenal medulla compare with regard to their location and histology? 13. How is secretion of adrenal cortex hormones regulated? 14. Why are the ovaries and testes included among the endocrine gland? 15. What is the relationship between melatonin secretion and sleep? 16. What hormones are secreted by the gastrointestinal tract, placenta, kidneys, skin, adipose tissue, and heart? 17. What are some functions of prostaglandins and leuko- trienes? 18. What is the role of the hypothalamus during stress? 20. How are stress and immunity related? 19. Which hormone is related to the muscle atrophy that occurs with aging?
Frederick Griffith accidentally discovered transformation when attempting to develop a vaccine for pneumonia. He injected mice with samples from S-strain (virulent) and/or R-strain (non-virulent) pneumococci bacteria (Streptococcus pneumonia)
A newly identified plant virus infects and kills its host by inserting large protein channels into thylakoid membranes, creating permanent holes. Which arrow would you cross out to represent the effect of these holes?
A new type of cell was discovered on Mars in an organism growing inbenzene, a nonpolar liquid. The cell has a lipid bilayer made ofphosphlipids, but its structure was very different from that of ourcell membranes. What properties would you expect to ..
How will increasing the number of yeast cells affect the rate of ATP production by the cells (inmoles ATP / hr) if the sugar concentration in the experiment is held constant?
In a populationof mice, there are two alleles of the A locus (A1 and A2). Tests show that in this population there are 384 mice of genotype A1/A1,210 of A1/A2, and 260 of A2/A2. What are the frequencies of the two alleles in the population?
Bradford Assay was performed with samples in triplicate. I got the standard curve and using three abosorbance from the plate reader for the samples and then I extrapolated the protein samples.
Two mice of the same species have different ear shapes. You find that one mouse, having normal shaped ears, was caught in a field in Kenya.
Viruses use the host cell machinery to replicate. However, some viruses replicate their genomes by a mechanism that host cell cannot support.
Draw an example each of a nucleotide and a nucleoside. Labelthe position of the purine or pyrrimidine ring, the position wherea ribose molecule can attach, and the position of bonding of asecond nucleotide or nucleoside.
The M and N blood type alleles are codominant. At the unlinked 1 locus determing the A/B/O blood type, alleles IA and IB are codominant, but both are dominant to i. Both Parents of type a typw MNA woman are MNAB, but her type MNB husband has a typ..
Determine the difference between zygotic, gametic, and sporic life cycles? Include the haploid and diploid generation lengths and cellularity.
The Rural Development Agency of Upper Camumba has just received a grant that will allow it to electrify the valley of Chinga Creek. Eight villages should be linked to the main power net at minimum total cost. Costs for each potential link, in thousan..
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