Tear layer anatomy
Mucin
Aqueous
Lipid
Sympathetic division
Fight or flight
Adrenergic agonists
Adrenergic antagonist/ blocker
Parasympathetic division
Rest and digest
Cholinergic agonist
Anticholinergic
Neurotransmitters
Nerve impulse
Axon
Synaptic cleft
Dendrite
Neurotransmitters
Parasympathetic division
Neurotransmitter
Acetylcholine
Receptors
Muscarinic
Nicotinic
Sympathetic division
Neurotransmitter
Norepinephrine
Receptors
Beta adrenergic receptors