Arizona has 30 State Senate members: 13 (Democrats), 16 (Republicans). Length of term: 2 years. Term limits: 4 terms (8 years). Arizona has 60 State House members: 24 (Democrats), 36 (Republicans).Length of term: 2 years.oll Opening & Closing Times: In the state of Arizona, all polling places are open from 6:00 AM to 7:00 PM Mountain Time. Next State Constitutional Officer Elections in 2018.
Thin and thick filaments are organized into repeating units called sarcomeres. Dark lines called Z-lines mark off the boundaries of each sarcomere. Thin filaments attach to the Z-lines at both ends of the sarcomere, while thick filaments are unattached. Each myofibril contains thousands of sarcomeres.
Myosin can only bind to actin when the binding sites on actin are exposed by calcium ions. Actin molecules are bound to the Z line, which forms the borders of the sarcomere. Other bands appear when the sarcomere is relaxed. The sarcomeres are what give skeletal and cardiac muscles their striated appearance.1  A sarcomere is defined as the segment between two neighboring Z-lines (or Z-discs, or Z bodies). 2  In electron micrographs of cross-striated muscle, the Z-line appears as a series of dark lines.he sarcomeres are what give skeletal and cardiac muscles their striated appearance. 1  A sarcomere is defined as the segment between two neighboring Z-lines (or Z-discs, or Z bodies). 2  In electron micrographs of cross-striated muscle, the Z-line appears as a series of dark lines.