Question

Check your understanding of muscle fiber recruitment by reading the following scenario and then answering the questions. Check your answers when you've finished. Scott is a swimmer on the university swim team. Before each competition, he spends some time walking around the pool area, getting psyched up for the event. He swings his arms a little shakes his legs, and just generally tries to loosen up. Soon he's in position on the starting block, waiting for the sound of the starting gun. The gun fires, and Scott dives off the block into the water, swimming his best event: the 50-yd freestyle. 1. As Scott was warming up, he was primarily recruiting fibers to create the force needed. a type b. type lla c. type IIx 2. During Scott's warm-up phase, all of his muscle fibers that were stimulated were acting O a minimally Ob maximally 3. When Scott dove into the pool and swam the 50-yd freestyle, his_ and type llx fibers were activated to produce the force he needed to spring from the blocks and swim all-out. a type b. type lla c. type Ilc 4. To produce the force to spring off the blocks and swim a fast freestyle, Scott's nervous system activated to produce more force. a fewer muscle fibers b. the same amount of muscle fibers c. more muscle fibers 5. When Scott exploded off the starting block and sprinted 50 yards, motor units with neurons were recruited O a smaller O b. medium c. larger

Answer 1

11. •oTчhe I 2.0 b) Maximally 2.) Тара на 4.0 c) More muscle 5. • с) ал fibers