When one sperm cell unites with one egg cell, this is called

According to the article containing the Kim, et al. study (Oh Rats!), empirical psychology relies on data from

(a) observations and experiments (b) philosophic speculation (c) theoretical formulations (d) new age reasoning

__________ is a process in which neurotransmitters are moved back to a pre-synaptic neuron

a. Reuptake b. Synaptogenesis c. Plasticity d. Axo-axonal communication