If the length of the absolute refractory period in cardiac muscle cells was the same as it is for skeletal muscle cells a. it would be much longer before cardiac cells could respond to a second stimulation b. tetanic contractions might occur, which would stop the heart's pumping action c. contractions would last as long as the refractory period d. it would be less than 1-2 milliseconds

How is anaerobic respiration affected by changes in temperature? (5 points)based on the conditions of early earth, what conclusion can you draw about the amount of anaerobic respiration that was occurring at earth’s beginning? explain your answer.(5 points)if there was a sudden drop in temperature after the evolution of the first living cells, predict how that might have affected the changes in the atmosphere and the evolution of cyanobacteria and other autotrophs. explain your answer. (5 points)