Pregnant women suffering from the common cold can be reassured about the safety of short-term use of OTC cold medications. These drugs, however, should not be used indiscriminately or for extended periods of time. In addition, use should be confined to only those products that are appropriate for the symptoms.
Acetylcholine (ACh) is a common neurotransmitter secreted by a variety of neurons. It binds to two different receptors-Ionotropic (fast) nicotinic receptors and metabotropic (slow) muscarinic receptors. 1  role in central nervous system. 2  role in peripheral nervous system. 3  receptors and signaling. 4  agonists and antagonists.
A preganglionic neuron has its cell body in the spinal cord or brainstem and is modulated by higher centres and by spinal reflexes (Fig. 6-1). The preganglionic axon leaves the CNS from the cranial, thoracic, lumbar or sacral regions and synapse in the autonomic ganglia with the cell body of the postganglionic neuron.