In swallowing, one portion is volunatary and one part is involuntary. â¢ Buccal phase o Voluntary contraction of the tongue o Step 1 in figure â¢ Pharyngeal-esophageal phase o Involuntary o Control center in the medulla and lower pon o Step 2-5 in figure.
Considerations. Serotonin is a mood regulator that occurs naturally in the body. When serotonin levels are chemically altered, as they are with the use of diet supplements such as Phentermine, a chemical imbalance occurs that may lead to feelings of anxiety or depression.
Wellbutrin affects different brain chemicals than do SSRIs, and some of those chemicals may play a role in appetite. Researchers donât know all the reasons why some antidepressants appear to cause weight gain and others do not, Perlis said. Some people gain weight and others lose weight as a result of depression. Consequently, researchers have trouble untangling the effects of medication and the effects of depression on weight, Perlis said. The new study also canât prove the antidepressants were responsible for weight gain.