In the following list of events required for muscle contraction, which occurs second? Group of answer choices calcium binds troponin action potentials spread along muscle cell membrane action potentials spread along motor neuron membrane Acetylcholine is released

If water were a non polar molecule, how would its properties be different ? a.) water would be a much lighter molecule b.) water would be able to climb up inside plants c.)water would not be able to form hydrogen bonds d.) water would stick together much more strongly

What is the farthest destination to date for a human spaceflight mission?

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.