Question 1
The substance in muscle fiber cytoplasm that directly powers muscle contraction is
◦ glucose.
◦ phosphocreatine.
◦ fatty acids.
◦ ATP.
Question 2
The advantage of anaerobic metabolism is
◦ greater endurance.
◦ fewer by-products.
◦ greater use of fat stores.
◦ fast ATP production.
◦ high yield of ATP.