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).
Contribution limits. The IRS sets guidelines for how much you can contribute to an HSA each year. Following are the annual contribution limits for 2017 and 2018: You have until the tax-filing deadline (generally April 15) of the following year to make allowable contributions. Catch-up contributions can be made any time during the year you turn 55. See below for more information. Individual vs. family contribution limits