The Water Cycle: The U.S. Geological Survey explains what the water cycle is and where water comes from. Animated Water Cycle: This animated water cycle diagram allows kids to click on different parts of the cycle to see how water changes form and moves.
The neuromuscular junction (NMJ) is the site of communication between motor nerve axons and muscle fibres. It is composed of four specialised cell types: motor neurons, Schwann cells, muscle fibres and the recently discovered kranocytes.
NMDA receptors are a specific type of glutamate neurotransmitter receptor that is localized in the membrane of post-synaptic neurons throughout the CNS, but predominantly in the hippocampus, forebrain, basal ganglia, spinal cord and cerebellum.