How does bile emulsification of fats aid in their digestion?
What will be an ideal response?
Emulsification is the dispersion of droplets of fat in a fluid. Water-insoluble triglycerides from food tend to clump together as fat globules. Contractions of the small intestine break big globs of fat into smaller droplets, then bile salts coat the droplets so they remain separated. Compared to big globules, the many small droplets present a much greater surface area to the lipases that break triglycerides into fatty acids and monoglycerides. Without emulsification, the lipases would only reach the surface of the fat globules and digestion would be impaired.
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Herceptin medication used for treating breast cancers, and Gleevec medication used for leukemia demonstrate that
A. each type of cancer is treated differently depending on the cellular structure targeted by the cancer. B. the cell membrane is the common cell component that fails in all cancers. C. "chemotherapy" of breast cancer and other cancers is directed towards quickly killing all cells in the affected tissue. D. medical research has now given us strong prevention of these two cancers. E. All of the answer choices are correct.
Sieve tubes are different from vessel members
because they a. do not have nuclei. b. are not connected to each other. c. are alive at maturity. d. conduct minerals. e. fit all of these descriptions.
In a certain breed of chicken, two genes control color. A dominant allele (I) inhibits the expression of any color gene (C). The recessive allele (c) results in albinism when homozygous (cc). The F2 phenotypic ratios of a cross between a colored chicken (ii CC) with a white chicken (II cc) would be ____white, _____ colored.
Fill in the blank(s) with the appropriate word(s).
Differences between meiosis in males and in females.