Biology, 13.02.2020 20:23 Fangflora3
The three structural features of the small intestine that increase its surface area are the , the villi, and the microvilli. 2. The finger-like projections that cover the circular folds of the small intestine and contribute to the increased surface area of the small intestine are called . 3. The absorptive cells that line the wall of the intestine are called . 4. The hair-like projections that cover the surface of an enterocyte and contribute to the increased surface area of the small intestine are called . 5. The collective term for the carpet of microvilli that covers the enterocytes of the small intestine is the . 6. Each villus contains a lymphatic vessel called a that absorbs fat-soluble nutrients into the lymph fluid. 7. The tiny blood vessels located in each villus that absorb water-soluble nutrients into the bloodstream are . 8. The first section of small intestine, receiving chyme from the stomach, is called the . 9. The middle portion of the small intestine is called the . 10. The last portion, or segment, of the small intestine is called the .
Answers: 3
Biology, 22.06.2019 02:50, mccay5016987
Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?
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Biology, 22.06.2019 03:00, ghkfkhgm859
Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .
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Biology, 22.06.2019 04:30, Lindsay882
Why are scientists concerned about the depletion of the ozone levels in the stratosphere?
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The three structural features of the small intestine that increase its surface area are the , the vi...
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