"The electric impulses generated by stimuli reach the synaptic knob wh

1.	"The electric impulses generated by stimuli reach the synaptic knob where certain chemical substances are secreted." Name the chemical substances referred here.
Answer» "The electric impulses generated by stimuli reach the synaptic knob where certain chemical substances are secreted." Name the chemical substances referred here.

"The electric impulses generated by stimuli reach the synaptic knob where certain chemical substances are secreted." Name the chemical substances referred here.

Answer»

"The electric impulses generated by stimuli reach the synaptic knob where certain chemical substances are secreted."

Name the chemical substances referred here.