Multiple Choice
Refer to the graph showing world record times for running events of different durations.Each colored band in the graph (labeled 1-3) corresponds to the time courses of the three energy systems that supply fuel to the muscles. 
During which time period(s) are mitochondria the main source of ATP for the runner's muscles?
A) Time period 1, approximately 0-10 seconds
B) Time period 1, approximately 0-30 seconds
C) Time period 2, approximately 30-120 seconds
D) Time periods 2 and 3, approximately 30-10,000 seconds
E) Time period 3, approximately 120-10,000 seconds
Correct Answer:
Verified
Correct Answer:
Verified
Q57: A major disadvantage of the glycolytic system
Q58: Which statement pertaining to smooth muscle is
Q59: Muscle tone is the condition in which<br>A)
Q60: How do muscle fibers shorten during contraction?<br>A)
Q61: While lifting weights at the gym, you
Q63: Depletion of muscle glycogen results in<br>A) tetanus.<br>B)
Q64: Refer to the figure showing the growth
Q65: Which feature characterizes skeletal muscle contraction?<br>A) Sarcomeres
Q66: _ chemically binds with calcium, and this
Q67: A muscle's capacity to be shortened is