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.
  Smooth muscle lines the intestines, and contracts in waves to push food along.   Smooth muscle smooth muscle The type of muscle that the pushes food down to the intestines is called smooth muscle tissue. This is an involuntary non-straited muscle that is found within the walls of blood vessels.Yes smooth muscles are the muscles found in small intestine. Smooth muscle smooth muscle The type of muscle that the pushes food down to the intestines is called smooth muscle tissue. This is an involuntary non-straited muscle that is found within the walls of blood vessels.