Central chemoreceptors located in the medulla provide feedback to increase the rate and depth of breathing when they sense: select one: a. decreased levels of oxygen in the blood and an increase in the ph of the cerebrospinal fluid. b. increased levels of oxygen in the blood and a decrease in the ph of the cerebrospinal fluid. c. slight decreases in carbon dioxide and an increase in the ph of the cerebrospinal fluid. d. slight increases in carbon dioxide or a decrease in the ph of the cerebrospinal fluid.

the actual answer was 160934

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a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u