Why has the attention been focused on melanocortin-releasing neurons in the arcuate nucleus rather than the neuropeptide Y releasing neurons?
What will be an ideal response?
Because injections of a-melanocyte-stimulating hormone have been shown to suppress eating and promote weight loss; it seems, however, that the melanocortin system is only a minor component of a much larger system: elimination of leptin receptors in the melanocortin system produces only a slight weight gain
You might also like to view...
Transposable elements
A. are DNA sequences that can "jump" within the genome. B. are segments of RNA found in chromosomes. C. result from damage to the chromosomes by things like radiation. D. are another name for translocations. E. are formed during transcription.
Which of these is NOT a component of
biodiversity?
a. genetic diversity b. species richness c. ecosystem diversity d. ecological footprints e. more than one of these
The sac fungi are members of the
a. Ascomycetes. b. Basidiomycetes. c. Glomeromycetes. d. Chytrids.. e. Zygomycetes.
A DNA region that can "jump" from one location to another is called a
a. frameshift mutation. b. transposable element. c. mutagen. d. polysome. e. base-pair substitution.