Whether it is brand-new or years old, a mattress too soft for your comfort level may make for many restless nights. As long as the mattress is in good shape, there's no need to replace it to achieve the desired level of firmness.Instead, purchase a firm topper, slide a bed board beneath the mattress, or add extra support to the bed frame itself. sheet of plywood cut to the same size as the mattress offers support for a mattress that has lost some of its firmness. Slide the plywood between the mattress and box spring.
Human cells normally contain 23 pairs of chromosomes, for a total of 46 chromosomes in each cell (illustration). A change in the number of chromosomes can cause problems with growth, development, and function of the bodyâs systems.
While most of our genes do their jobs as expected, a small number may become inactive or stop working the way they should. This inactivity or malfunctioning can change the way cells grow, which may eventually lead to the development of a tumor. Brain tumors can also be associated with changes in the chromosomes. Each normal cell in any human body has 23 pairs of chromosomes. The most common chromosomal changes in brain tumors occur on chromosomes 1, 10, 13, 17, 19, and 22.