By contrast, postganglionic fibers in the parasympathetic division are cholinergic and use acetylcholine as a neurotransmitter. In the sympathetic nervous system, the postganglionic neurons of sweat glands release acetylcholine for the activation of muscarinic receptors.
The International Space Station (ISS) is made up of multiple materials. Lightweight metals, plastics, and carbon fibers make up the majority of the state. The International Space Station (ISS) is made up of multiple materials. Lightweight metals, plastics, and carbon fibers make up the majority of the state.
By the way, your description of the ISS as âfloatingâ is not quite accurate. It has a current total mass of over 400,000 kg, and is pulled downward by gravity with a force of 4 million newtons (about 1 million pounds). Gravity extends to that altitude (and beyond), and is only a few percent less than at ground level.