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.
Types of Muscles. Our bodies have three kinds of muscles. The smooth muscles, the cardiac muscles and the voluntary muscles. Each of these three muscle types have a specific job to do and each of them look entirely different under microscopes.The smooth muscles are the ones that are responsible for parts of the body like the digestive system, the blood vessels, and the kidneys.You have no conscious control of the smooth muscles or the jobs that they do. Our nervous system controls the smooth muscles. We don't control the cardiac muscles either.ach of these three muscle types have a specific job to do and each of them look entirely different under microscopes. The smooth muscles are the ones that are responsible for parts of the body like the digestive system, the blood vessels, and the kidneys.