Short Term

• C-P +ADP -> C ATP (short bursts)
• Glycolysis- Glycogen -> glucose ->->-> pyrovate-> mitochondria= ALOT of ATP (Moderate)
• (or) pyrovate-> lactic acid->blood-> liver (peak activity)=90 % glucose goes to lactic acid, 10 to mitochondria
• for liver to convert back to glucose takes a lot of energy
• very effecient with enough oxygen (when it goes to mitochondria)
• limitation of mitochondria= amount of oxygen

• aerobic
• more blood supply
• more # mitochondria
• more myoglobin= oxygen storage

• anaerobic
• less blood supply
• less # mito
• more #myofibrils
• more number of glycogen stores

• trigger= calcium
• calcium comes from SR
• calcium stimulated by an action potential
• calcium binds to troponin, troponin moved tropomyosin away from actin head (now exposed)
• actin binds to myosin
• power stroke= contraction (ATP is stored in mysoin head)
• ATP releases myosin head
• ATP recocks the myosin head