Which of the following concepts suggests that if two neurons are activate at the same time, the connection between them (and thus the memory) may be strengthened?

a. the hierarchy system of classification
b. the schema concept
c. the implicit memory concept
d. the concept of long-term potentiation

Answer is Option D:  the concept of long-term potentiation

Explanation:

Neurons work with each other through electrical events. At synapse, which is the "junction" between two neurons, a chemical neurotransmitter is released by neuron A , caused by an action potential.

Memory is often described as a function of brain cells which form connections by getting together.  "Long-term Potentiation (LTP)" is a constant increase in strength after a high frequency chemical synapse. Thus, this is the concept of LTP says that if two neurons "activate" at a given time, then the "connection" between them will increase and as a result the memory will also get strengthened.

propioception;

answer; the automatic system because it is a "gut reactor"