The Florida Senate has passed a measure that backers hope will allow the uninsured to get cheap healthcare coverage. The plan would give some of the nearly 4 million uninsured Florida residents the chance to get no-frills health insurance for as little as $150 a month. Only people between ages 19 and 64 would be eligible, and the bill would make the insurance cheaper by allowing participating health plans to cut back on the number of procedures and treatments they are typically required to cover.