Which of the following regions of the brain provides the precise timing and appropriate patterns of skeletal muscle contraction for the smooth, coordinated movements and agility that are needed for our daily living?

a. cerebellum
b. pons
c. midbrain
d. medulla oblongata
a. cerebellum

exposure to hazardous carcinogens and toxic substances can cause breathing problems, such as copd and various types of cancer. it also increases the risk of heart attacks and strokes and has serious (but no less unattractive) side effects, such as aging, yellow teeth, a terrible smell and damage to the vocal cords.