HDWK Activity Chapter 35 Fig. 35.10 Questions and Answers | Latest Update | Graded A+

HDWK Activity Chapter 35 Fig. 35.10 Questions and Answers | Latest Update | Graded A+ **Question 1: What variables were plotted on the graph showing percent force versus percent muscle length?** - **(a)** The dependent variable was the percentage of force exerted by the muscle. - **(b)** The independent variable was the percentage of muscle length. - **(c)** The dependent variable was the force exerted by the muscle. - **(d)** The independent variable was the length of the muscle. (a) and (b) --- **Question 2: A muscle's force is influenced by the total cross-sectional area of all fibers activated to contract. If the maximum force per unit area of a muscle is 25 N/mm2 at 100% contraction, how much force (in Newtons, N) would a muscle produce with a cross-sectional area of 1 cm2 of actively contracting fibers?** - **(a)** 25 N - **(b)** 250 N - **(c)** 2500 N - **(d)** 10 N (c) 2500 N --- **Question 3: What was the experimental hypothesis regarding changes in actin and myosin overlap within a sarcomere?** - **(a)** Increases in overlap favor more cross-bridges to form, increasing muscle force. - **(b)** Increases in overlap disrupt cross-bridge formation, reducing muscle force. - **(c)** Differences in overlap and cross-bridge formation have little effect on muscle force. - **(d)** Overlap is minimal at intermediate sarcomere (and muscle fiber) lengths.