bio 254 exam 2 Questions 100% Solved!

how do muscles get ATP -ANSWER creatine phosphate for quick ATP glycogen for anarobic myoglobin for aerobic which cell types are capable of mitosis -ANSWER osteogenic cells what are myofibrils made of -ANSWER thick and thin filaments what are thin filaments made of -ANSWER tropoin and tropomyacin are regulatory proteins the main one involved is actin what are thick filaments made of -ANSWER myosin does actin and myosin change length? -ANSWER no how do troponin and tropomyacin regulate proteins -ANSWER calcium binds to troponin. causes troponin to change shape. tropomyacin move to expose binding sites for myosin head how does endochondral ossification work -ANSWER cartilage model of the bone form and ossification center develops inside the cartilage where does ach bind -ANSWER protein receptors on the sarcolemma. this starts an action potential on the sarcolemma that will travel along the transverse tubules after atp binds to myosin heads -ANSWER atp splits and shifts theh myosin heads to the cocked position ready to pull again relaxation happens when -ANSWER calcium is removed from the cytoplasm and returned back into the SR long bones -ANSWER femur of thigh humerous of arm radius ulna tibia fibula metacarpal / metatarsal bones phalanges