Think of an everyday body function that requires excitatory neurons and inhibitory neurons to control an effector organ. What body function and effector organ are you thinking of, and what does each type of neuron do for it?

materials water oxygen those are the things i can think of in this moment.

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.

well the answer is 2!