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.
A neuromuscular junction (sometimes called a myoneural junction) is a junction between nerve and muscle; it is a chemical synapse formed by the contact between the presynaptic terminal of a motor neuron and the postsynaptic membrane of a muscle fiber.he development of the neuromuscular junction requires signaling from both the motor neuron's terminal and the muscle cell's central region. During development, muscle cells produce acetylcholine receptors (AChRs) and express them in the central regions in a process called prepatterning.
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.