Cocaine normally stays in the system for approximately 48 hours. Although the method of administration and the dose administered affects how long it takes for the body to metabolize this drug. When coca leaves are chewed, absorption time is around 30 minutes.
Arm Abduction. Abduction of the arm is also called abduction of/at the shoulder. This motion actually can be divided into two motions: true abduction of the arm at the shoulder and upward rotation of the scapula. Muscles: supraspinatus (initiates abduction - first 15 degrees), deltoid (up to 90 degrees), trapezius and serratus anterior (scapular rotation, for abduction beyond 90 degrees).
It isn't. The triceps brachii muscle (which is actually a group of three muscles) is the strongest set of muscles in the arm and accounts for nearly 60% of the upper arm's mus â¦ cle mass.The triceps are primarily responsible for the extension of the elbow joint (straitening of the arm). For instance to bend and close the arm at the elbow, the flexor muscles (biceps) contract while the opposing triceps relax. And then to straighten the arm, the triceps (extensor muscles) will contract while the biceps relax.   Rotator muscles work together to turn and twist the arm.