Pretest-posttest designs grew from the simpler posttest only designs, and address some of the issues arising with assignment bias and the allocation of participants to groups. One example is education, where researchers want to monitor the effect of a new teaching method upon groups of children.
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.he neuromuscular junction (NMJ) is the site of communication between motor nerve axons and muscle fibres.
Benoit Zuber. Communication between neurons, or nerve cells, is the cellular basis for thinking, decision making, and control of muscular movements.Neurons are cells with a particular shape: they possess two types of long ramification, called the axon and the dendrites.The axon of one neuron is in contact with the dendrites of other neurons. These contacts are termed synapses.enoit Zuber. Communication between neurons, or nerve cells, is the cellular basis for thinking, decision making, and control of muscular movements.