The Properties of muscle tissue
Scientist is studying the properties of muscle tissue. They are able to examine a single sarcomere within a myocyte, as demonstrated in Figure. They then artificially induces the sarcomere to contract. When this occurs, which of the following sections (as identified by the correct letter in Figure A and correct name) will not decrease in length?
a. Section C; A band b. Section C; H zone c. Section B; I band d. Section D; I band e. Section B; A band 11. In skeletal muscle cells, which of the following has an ATPase activity? a. Myosin b. Actin c. Tropomyosin d. Troponin e. Titin 12. The diagram shows the length-tension relationship for a single sarcomere. Why is the tension development maximal between points B and C?
a. Actin filaments are overlapping each other b. Myosin filaments are overlapping each other c. The myosin filament is at its minimal length d. Thediscs of the sarcomeres are far apart from each other e. There is optimal overlap between the actin and myosin filaments 13. Which of the following best describes an attribute of visceral smooth muscle not shared by skeletal muscle? a. Contraction is ATP dependent b. Can contract in the absence of action potential
