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.
1 Thereâs no age limit for contributions to Roth IRAs. 2  For regular IRAs, you lose the ability to make contributions in the year you turn age 70Â½. 3  Not so for Roth IRAs. 4  If you meet the other requirements, you can set up a brand new Roth IRA at age 85 and begin saving for your âretirement.â Thereâs also no lower age limit.he Contribution Limit. For 2013 and 2014. the basic limit for regular contributions to a Roth IRA is $5,500 for people under 50 years of age, and $6,500 for those who are 50 or older. (Numbers like this can be found in our Reference Room .) This limit may be reduced for any of the following reasons: