Amedical equipment company is thinking of expanding by developing lie detection machines that measure perspiration, cardiovascular, and respiration changes. on which system should their research focus?

The company should focus on the Sympathetic Nervous System.

Explanation:

The Sympathetic Nervous System, also known as the fight-or-flight response of the body, is responsible for the activation of the adrenergic receptors by binding adrenaline (epinephrine) and/or noradrenaline (norepinephrine). These hormones are produced by the adrenal medulla.  

During a Polygraph test or a Lie Detector test, indicators such as pulse, blood pressure, skin conductivity, and breathing are recorded while the individual is being questioned. Any deviation from the normal values may indicate that the person is lying.

The effects seen during the fight-or-flight response are as follows: