Some muscles (skeletal muscles) will not contract unless stimulated by neurons; other muscles (smooth & cardiac) will contract without nervous stimulation but their contraction can be influenced by the nervous system. Thus, the nervous and muscle systems are closely interconnected.
A Roth IRA is an individual retirement plan that is subject to rules that would apply to a traditional IRA, but with some exceptions [source: IRS ]. Contributions are not tax deductible and qualified distributions are tax free. Here are some of the things you must consider when setting up a Roth IRA account:1  The account must be designated as a Roth IRA when it's opened. 2  The account can be opened at any time. 3  Contributions can be made at any age.ontributions are not tax deductible and qualified distributions are tax free. Here are some of the things you must consider when setting up a Roth IRA account: 1  The account must be designated as a Roth IRA when it's opened. 2  The account can be opened at any time.
Age Limits for a Roth IRA. One of the beauties of a Roth IRA is that there are not a lot of restrictions to the investment like a 401k retirement plan or a traditional IRA. There are no restrictions to the age you start investing in a Roth IRA.You can open a Roth IRA account at any age. Also, you can continue to contribute to a Roth IRA until you die as long as you have an earned income. This is not the case for a traditional IRA or a 401k retirement plan.ne of the beauties of a Roth IRA is that there are not a lot of restrictions to the investment like a 401k retirement plan or a traditional IRA. There are no restrictions to the age you start investing in a Roth IRA. You can open a Roth IRA account at any age.