Consider the gedanken experiment discussed in Section2.6 in which a giant fl oodlight stationed 400 kmabove the Earths surface shines its light across themoons surface. How fast does the light fl ash acrossthe moon?
Lecture objectives 15 Neuromuscular transmission 1. How does the movement of the myofibrils lead to muscle contraction Myosin head attaches to actin, ADP and P are released as myosin head pivots, moving to a low energy state. It pulls the actin filament with it towards the M line. ATP attaches to myosin, releasing it to the myosin head from the actin. As ATP is hydrolyzed to ADP and P the myosin head return to the pre stock high energy cocked position. 2. Describe and identify the motor unit A motor unit is made up of a otor neuron and the skeletal muscle fibers innervated by that otor neuron's axonal terminals. Groups of otor units often work together to coordinate the contractions of a single muscle. A single branch motor neuron only contact a single mu