Dimethylmercury ((CH3)2Hg) is an organomercury compound. This colorless liquid is one of the strongest known neurotoxins. It is described as having a slightly sweet smell, although inhaling enough vapor to detect its odor would be hazardous.
The formation of a star begins with gravitational instability within a molecular cloud, caused by regions of higher density-often triggered by shock-waves from nearby supernovae (massive stellar explosions), the collision of different molecular clouds, or the collision of galaxies (as in a starburst galaxy).
When Ca2+ binds to a myosin head, it triggers the formation of a cross-bridge between myosin and actin. 52. In __________ contraction, the peak tension developed is less than the resistance, and the muscle elongates as a result of the contraction of another muscle or the pull of gravity.