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.
Differences: 1  NMJ is always Acetylcholine, while a synapse is only sometimes Acetylcholine. 2  A synapse is a junction between two neurons, while an NMJ is a junction between a motor neuron and a skeletal muscle fiber. 3  A synapse may be excitatory or inhibitory, while an NMJ is always excitatory.