The driving age should be raised up to 18 because teens can be a little careless. Driving at the age of 18 is a more mature age for teens because they can have more responsibility. Teens should not be driving at the age of 16 because they could be texting and driving or drinking and driving with some friends.
During contraction, the smooth-muscle cell's intermediate filaments help to draw the cell up, like closing a drawstring purse. Calcium ions regulate contraction in smooth muscle, but they do it in a slightly different way than in skeletal muscle: Calcium ions come from outside of the cell. Calcium ions bind to an enzyme complex on myosin, called calmodulin-myosin light chain kinase.
Best Answer: Smooth muscles are found exclusively in blood vessels and most hollow organs such as the uterus, bladder and the digestive tract. They contain one nucleus per cell and lack the typical arrangement of sarcomeres found in skeletal and cardiac muscles. This gives it itâs smooth appearance. Striated muscles include the skeletal and cardiac muscles. Skeletal muscle attaches to skeletons and is in charge of movements. Cardiac muscles are found only in the heart and contain multiple nuclei and sarcomeres that lead to its striated appearance.