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 outer part, the adrenal cortex, produces several classes of steroid hormones such as estrogen, progesterone, cortisol, aldosterone and some others. The inner part, called the adrenal medulla, secretes chemicals like epinephrine, norepinephrine and dopamine. These two parts of the adrenal glands are functionally very different, and have different embryological origins. In some species of fish and amphibians these functions are carried out by two different organs.