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. A muscle fiber from a biceps muscle may contain 100,000 sarcomeres.uscle fibers are composed of tubular myofibrils. Myofibrils are composed of repeating sections of sarcomeres, which appear under the microscope as dark and light bands. Sarcomeres are composed of long, fibrous proteins as filaments that slide past each other when a muscle contracts or relaxes.