Imbalances in acetylcholine can contribute to the development of myasthenia gravis, an autoimmune disorder that causes muscle weakness and fatigue. Alzheimerâs and Parkinsonâs Disease. The cholinergic portion of the brain is the area of the brain that produces acetylcholine.
1 Position the duck on a rack placed in a roasting tray, breast side up. 2  Pour a few cups of boiling water over the duck and into the roasting tray and place into the preheated oven. 3  Roast the duck for up to 3 hours or until no fat remains and the skin is crispy and brown, turning the duck over after every 30 minutes. Pour a few cups of boiling water over the duck and into the roasting tray and place into the preheated oven. 2  Roast the duck for up to 3 hours or until no fat remains and the skin is crispy and brown, turning the duck over after every 30 minutes.
Lay the duck breasts in the pan with the skin sides down. Cook for 3 to 5 minutes, depending on the size of the breasts. 5. Turn the breasts to the other side with a pair of tongs.ierce the skin and thick fat layer of the duck. Use a knife or skewer, and make piercings at one-inch (2.5 cm) intervals. Be sure to pierce all the way through the fat layer just below the skin, but not into the meat.