The auditory system changes a wide range of weak mechanical signals into a complex series of electrical signals in the central nervous system. Sound is a series of pressure changes in the air.
Itâs Not Too Late to Maximize Your 2016 HSA Contributions: Contribute Until April 17, 2017. One of the big pros of enrolling in a high-deductible health plan is that it is paired with a Health Savings Account (HSA).
Those covered by an HSA-eligible health plan on Dec. 1 of a given year are considered eligible individuals for the entire year and may contribute the entire year's contribution to their HSA instead of making pro rata contributions by month. This is known as the Dec. 1 or last-month rule.