Explain pheromones and theorize why they are not significantly employed by humans? What will be an ideal response?
Pheromones are chemical signals that can be detected by other members of the same species. The
downside of them is that they tend to broadcast a relatively general message to all species members
that can detect. In the case of humans, our social interactions tend to be complex and specific to
different individuals. As a result, pheromones would not be very effective.
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Sterilization can be accomplished by use of:
A) an autoclave. B) antiseptics. C) medical aseptic techniques. D) pasteurization.
Blood in arteries ____
a. travels to arterioles b. travels away from the heart only if it is oxygenated c. always travels toward the heart d. travels from the lungs e. is always oxygenated
__________ are the receptors that are probably most numerous and active in the body
a. Proprioceptors b. Nociceptors c. Chemoreceptors d. Mechanoreceptors e. Electrorecepto
The thin, sheetlike basal laminae are found
a. under epithelia. b. in the cytoplasm just below the plasma membrane. c. in the extracellular space surrounding all eukaryotic cells. d. in between adjacent cells connected by gap junctions.