Of course, not everyone feels that way during a closed-bore MRI, but itâs something to be wary of just in case. What if You Donât Think a Closed-Bore MRI Will Work For You? Thereâs two major reasons that someone might feel like they cannot undergo an MRI in a closed-bore machine.
estivation n 1: (zoology) cessation or slowing of activity during the summer; especially slowing of metabolism in some animals during a hot or dry period [syn: {aestivation}] 2: (botany) the arrangement of sepals and petals in a flower bud before it opens [syn: {aestivation}]
X inactivation is a process by which one of the copies of the X chromosome present in the female mammals is inactivated. The inactivated X chromosome condenses into a compact structure called as the he Barr body. Unlike the gene poor Y chromosome , the X chromosome contains over 1000 genes, that are essential for proper development and cell viability. Females carry two copies of X chromosomes , resulting in a double dose of X linked genes. To correct this imbalance mammalian females have evolved the unique mechanism of X chromosome inactivation. Transcriptionally silent Barr bodies maintain gene equality between makes ( XY ) and females ( XX ) .