By definition, pheromones are chemical signals secreted into the bloodstream

____________________ Indicate whether the statement is true or false.


F, environment

Biology & Microbiology

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A plant cell contains _____ genomes and an animal cell contains ______ genomes.

A. 3,2 B. 3,3 C. 2,3 D. 2,2 E. 1,1

Biology & Microbiology

Which gland is/are located nearest the kidneys?

A) ovaries B) pancreas C) pineal glands D) adrenal glands

Biology & Microbiology

An E-test can reveal

A) the minimum bactericidal concentration. B) the minimal inhibitory concentration of a drug. C) if a drug is bacteriostatic or bactericidal. D) the minimum bacteriostatic concentration. E) the mechanism of action for a particular drug.

Biology & Microbiology

How can a hormone that is present in very small quantities within the bloodstream elicit such a large response within a cell?

-Cells degrade the hormone into many tiny molecules, and then each piece creates a response within the cell. -The hormone is only taken up by the largest cells in the body, and thus it can elicit a large response. -The hormone is always an extra large macromolecule even though it is present in minute quantities. -The message from the hormone is amplified many times within the cell.

Biology & Microbiology