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.
The nucleus of a neuron is located in the axon hillock. Synaptic cells nourish neurons, insulate the axons of neurons, and/or regulate the extracellular fluid surrounding the neurons. The vast majority of neurons in the brain are sensory neurons. Sensory neurons transmit signals to muscle cells. None of the listed responses is correct.