Biology is a branch of science that deals with living organisms and their vital processes.
Chemistry is the science that deals with the properties, composition, and structure of substances
Physics is the natural science that studies matter, its motion and behavior through space and time, and the related entities of energy and force
Dendrite; axon; synapse
These are parts of the neuron which is considered as the basic unit of nervous system. The cell responsible for receiving sensory input from the external environment. The stimulus will be transported in an electrical signal via neuronal parts. Axon transmit signal to the other neuron. Dendrites are the receiving part of the neuron. Synapse is the space between each neuron where elctrical impulse is converted into a chemical signal via neurotransmitters.
When atomic orbitals mix and form a new atomic orbital