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A pinealoma is a tumor of the pineal gland, a part of the brain that produces melatonin. If a pinealoma destroys the cells of the pineal gland in a child, it can cause precocious puberty . Signs and symptoms
One study found the average age of presentation to be 4.3 years, with peaks at age 3 and 8. [3] Another cites cases to more commonly occur in patients under 2 years of age. [ 4 ] Rates of occurrence for males and females are similar, but may be slightly more common in females.
Pineocytoma, is a rare, benign, slowly growing tumor of the pineal gland.The pineal gland is a small endocrine gland close to the center of the brain that secretes melatonin into the bloodstream.
In cell biology, a biological pathway is a series of interactions among molecules in a cell that leads to a certain product or a change in the cell. Such a pathway can trigger the assembly of new molecules, such as a fat or protein.
One hypothesis is that these sticky cell surface markers cause the developing cell bodies to cluster or aggregate and their primitive neurites to tangle. As the cells grow, the neurite tangle remains centrally located and the cell bodies are squeezed to the periphery, thus explaining the rosette pattern.
In order to maintain a standard for Cell and molecular biology articles a standard color scheme should be used. The accepted colors for cellular locations are described in the table. Colors for other components, such as molecules, can be chosen at the discretion of the designer, however, the following should be considered:
In the beginning of the 20th century, one of the most prolific biological illustrators, Ernst Haeckel, discovered, described, and named thousands of new species, and his published work, Kunstformen der Natur, contained hundreds of prints of various organisms, many of which were first described by Haeckel himself.
Light micrograph of a moss's leaf cells at 400X magnification. The following outline is provided as an overview of and topical guide to cell biology: . Cell biology – A branch of biology that includes study of cells regarding their physiological properties, structure, and function; the organelles they contain; interactions with their environment; and their life cycle, division, and death.