The Human Body

Mania is the mood of an abnormally elevated arousal energy level. Elevated irritability is common along with behavior that seems on the surface to be the opposite of depression. Mania is a necessary symptom for certain psychiatric diagnoses. The word derives from the Greek μανία (mania), “madness, frenzy” and that from the verb μαίνομαι (mainomai), …

mania Read More »

Bipolar I disorder (BP-I; pronounced “type one bipolar disorder”) is a bipolar spectrum disorder characterized by at least one manic or mixed episode. Bipolar I disorder sometimes occurs along with episodes of hypomania or major depression as well. It is a type of bipolar disorder, and conforms to the classic concept of manic-depressive illness, which …

bipolar I Read More »

The lipid bilayer is a thin polar membrane made of two layers of lipid molecules. These membranes are flat sheets that form a continuous barrier around all cells. The cell membranes of almost all living organisms and many viruses are made of a lipid bilayer, as are the membranes surrounding the cell nucleus and other …

lipid bilayers Read More »

Collagen is the main structural protein of the various connective tissues in animals. As the main component of connective tissue, it is the most abundant protein in mammals, making up from 25% to 35% of the whole-body protein content. Collagen, in the form of elongated fibrils, is mostly found in fibrous tissues such as tendons, …

collagen Read More »

Bipolar II disorder (BP-II; pronounced “type two bipolar disorder”) is a bipolar spectrum disorder (see also Bipolar disorder) characterized by at least one episode of hypomania and at least one episode of major depression. Diagnosis for bipolar II disorder requires that the individual must never have experienced a full manic episode (unless it was caused …

bipolar Read More »