Skeletal muscle contractions do in fact demand large quantities of ATP (adenosine triphosphate), the universal source of cellular energy. In order to accommodate this necessity, skeletal muscle cells (myocytes) are packed with mitochondria, which are the energy powerhouses of the cell.
However, the production of ATP would halt in mitochondria if the necessary substrates (fuels) are not present to enter these organelles, mainly glucose and oxygen (O2). So, additionally, skeletal muscle is also loaded with glycogen, a storage form for glucose (as starch), and myoglobin, an enzyme similar to hemoglobin in that it binds an O2 to hold it for use during contraction.
Center of the nucleus that stores materials for making ribosomes
Answer: False
Explanation:
Ticks are the external parasites which survive by feeding the blood of the birds, reptiles, amphibians and mammals. Various species of the ticks are distributed world wide. They colonize and live in the countries with warm and humid climatic conditions. The moisture help them to undergo metamorphosis. There are many species in the families of lxodidae (hard ticks) and Argasidae (soft ticks) that are active parasites and are capable of causing diseases in humans.
