Usually called a sugar, glucose is the primary source of energy for every cell in the body. Glucose is largely converted from other carbohydrates in the foods we eat. The body breaks down the carbohydrates in the intestines using enzymes and other chemicals resulting in glucose as a final product.
Sunchokes are also called Jerusalem artichokes, so yes, they are the exact same things. Sunchokes, or Jerusalem artichokes, are an edible tuber that grows underground, much like a potato. They look a little bit like large knobs of ginger and taste slightly nutty, and savory like a cross between an artichoke heart and the best potato you've ever had.
A sunchoke is a tuber, like a potato, and is often prepared and eaten as a root vegetable. Light brown and bumpy on the outside and white inside, the sunchoke looks somewhat like a small potato or ginger root. It is native to North America and was cultivated by Native Americans prior to the arrival of European settlers.