Abattery-operated device was created to control the speed and rhythm of which human organ? stomach liver heart brain

heart

Explanation:

Pacemaker is a small microcomputer with integrated battery that lasts about 10 years or so (depending on usage). It senses the electrical activity of the heart through electrodes, which serve to keep the heart rate at a minimum frequency so as not to slow down, ie, a battery-operated device designed to control speed and rhythm. from heart.

People with a very low heart rate (less than 40 beats per minute) or breaks (heart failure where it has been beating for more than 3 seconds) or with some types of electrical block need a pacemaker.

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this

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:

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