Quick Answer. Swedish chemist and philanthropist Alfred Bernhard Nobel invented dynamite. Nobel mixed nitroglycerine and kieslguhr (diatomaceous earth) in a series of experiments in the 1860s to create the explosive, according to History Today. Nobelâs work in the arms industry led him to establish the Nobel prize.
Your bones and muscles work together through a series of impulses and signals communicated between the brain and skeletal muscles. In order to move, the nervous system signals a skeletal muscle to contract. When the muscle contracts, this movement causes the attached bone (or bones) to follow.
Describe how sympathetic and parasympathetic nervous systems work together to regulate heart rate. They both send the heart nerve impulses. Though the parasympathetic system does not directly change the force of contraction when decreasing heart rate. The sympathetic system increases heart rate.