In eukaryotes, while many metabolic pathways still occur in the cytosol, others are contained within organelles. The cytosol is a complex mixture of substances dissolved in water. Although water forms the large majority of the cytosol, its structure and properties within cells is not well understood.
Insomnia, also known as sleeplessness, is a sleep disorder where people have trouble sleeping. They may have difficulty falling asleep, or staying asleep as long as desired. Insomnia is typically followed by daytime sleepiness, low energy, irritability, and a depressed mood. It may result in an increased risk of motor vehicle collisions, as well as problems focusing and learning.
Types of Insomnia. There are two types of insomnia: primary insomnia and secondary insomnia. Primary insomnia: Primary insomnia means that a person is having sleep problems that are not directly associated with any other health condition or problem.