Summarize the results of performing genome-wide searches for genes that control obesity
What will be an ideal response?
The results of several of these genome scans indicate that important genes for obesity are located on nine different chromosomes. One of the early successes in this search was the identification of an allele of the FTO gene as one strongly associated with BMI. Current research efforts are directed at the mechanisms by which these genes confer risk for obesity. Further work may identify additional genes involved in obesity and provide a foundation for studying how these genes interact with environmental factors to cause obesity.
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The lipid group that is the major component of cell membranes is the ________.
A. triglycerides B. steroids C. waxes D. prostaglandins E. phospholipids
For circulating antibodies to reach the foreign cells in connective tissue, as an example in a puncture wound, what must happen?
a. Histamines must cause capillary permeability to decrease. b. Histones must cause interferons to be produced. c. Interferons must activate b cells. d. Antihistamines must deactivate goblet cells. e. Histamines must increase capillary permeability.
An animal found in the rocky intertidal zone has eight overlapping plates and is tightly adhering to the
rock with a muscular foot. This animal is most likely a member of the class:A. Polyplacophora. B. Polychaeta. C. Bivalvia. D. Gastropoda. E. Cephalopoda.
Why is it necessary for the testes to be in the scrotum to function properly?
A) The scrotum keeps the testes at a cool temperature necessary for sperm production. B) The sperm are produced in the scrotal tissue and transferred to the testes to finish maturation. C) The scrotum contains alkaline fluids to nourish the sperm. D) The testes develop from scrotal tissues. E) The scrotum elevates the temperature of the testes, which increases sperm production.