Question: are there nicotinic receptors in the heart?
Answer: N2 Nicotinic receptors are in the brain and also in the Autonomic and Parasympathetic nervous systems. ... You find Muscarinic Receptors in the brain, heart, smooth muscle, or in the Parasympathetic nervous system. While Nicotinic Receptors are found in the Sympathetic nervous system, Muscarinic receptors are not.