Stellar evolution is the process by which a star undergoes a sequence of radical changes during its lifetime. Depending on the mass of the star, this lifetime ranges from only a few million years (for the most massive) to trillions of years (for the less massive), considerably more than the age of the universe. ^
Small, relatively cold, low mass red dwarfs burn hydrogen slowly and will burn for hundreds of billions of years
Massive hot supergiants will live for just a few million years.
A mid-sized star like the Sun will remain on the main sequence for about 10 billion years. Hope tis helps!!
There are many reasons why researchers use mice as animal models in science and medicine. A huge reason why mice are used is that their genetics and behavioral characteristics are very close to humans. So, having an animal model for Huntington’s Disease would help scientists be able to study the disease further and make advancements in treatment options in a far less costly and a much safer way than studying it in humans. Mice as animal models can also help in a huge way because their lifespans are very short compared to humans (they only live about 2-3 years). This allows scientists to be able to study the affects of the gene over many generations in a much shorter amount of time.
Muscle energy and stroke rates of emperor penguins , implication for muscle metabolism and dive performance.
Answer:
Here is the complete statement: Cells are starved of energy when GLUCOSE is unable to enter.
Explanation:
Glucose, which is a monosacharide is the primary source of energy for all the cells in the body of humans. Glucose is the end product that is typically obtained from the digestion of carbohydrate. After digestion, the glucose is absorbed by the small intestine and is transported into the blood. Glucose needs the enzyme insulin in order to enter the body cells. When the glucose enter the cells, the cells use it to produce energy in the form of ATP. Without energy cells can not survive.
Without the help of insulin, glucose will not be able to enter the cells and the cells will starve and start to look for other meaning of biological fuel. This may include breaking down the protein in the body to convert it to glucose for energy.
The disease condition in which glucose that is present in the blood is not able to enter the cells due to non functional insulin is called diabetes mellitus.