T/F: individuals tend to increase muscle mass by increasing the number of muscle cells in a muscle. T/F: A muscle twitch is produced by multiple stimuli to a muscle cell.

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

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.