Answer:Retina
Answer: Vitamin A
Answer: Vestibular apparatus
Answer:Neurons
Answer: Gamma-Aminobutyric acid
Answer: Constriction of Pupils
Answer:Node of Ranvier
Answer: Acetylcholine
Answer: Dopamine
Answer:Autonomic system
Answer: Postsynaptic membrane
Answer: Endorphin
Answer: Oxytocin