Untitled

Autonomic Nervous System
│
├── Cholinergic System (Parasympathetic)
│   ├── Neurotransmitter: Acetylcholine
│   ├── Receptors:
│   │   ├── Nicotinic (Nn, Nm)
│   │   └── Muscarinic (M1–M5)
│   └── Effects:
│       ├── ↓ Heart rate
│       ├── ↑ GI motility
│       └── ↑ Secretions (saliva, tears)
│
└── Adrenergic System (Sympathetic)
    ├── Neurotransmitters: Norepinephrine, Epinephrine
    ├── Receptors:
    │   ├── Alpha (α1: vasoconstriction, α2: feedback inhibition)
    │   └── Beta (β1: ↑ HR, β2: bronchodilation, β3: lipolysis)
    └── Effects:
        ├── ↑ Heart rate and BP
        ├── Bronchodilation
        └── ↓ GI activity