The location of the nucleus can vary, depending on the type of the cell. The usual location of the nucleus is at the centre (animal cells), but it can also be at the periphery (plant cells). The reason for that is the vacuole that takes the central position in the plant cell.
A. Itching can be caused by many conditions. A common cause of itch is psychological, that is, due to stress, anxiety, etc. Stress also can aggravate itch from other causes.Dry skin (xerosis) is another frequent cause of itch. Many people also report sunburn itch following prolonged exposure to UV radiation from the sun.cabies is a highly contagious skin condition caused by an infestation by the itch mite Sarcoptes scabiei that is known to cause an intense itch that is particularly severe at night. Itching can also result from conditions that affect the nerves, such as diabetes, shingles (herpes zoster), or multiple sclerosis.
Itchy skin from anxiety isn't common in the general sense. But anxiety causes a great deal of stress, and stress has a damaging effect on organs. Since your skin is the largest organ on your body, anxiety is known to lead to rash and a feeling of itch. When it's anxiety, you'll rarely have only itchy skin. It's almost always accompanied by other symptoms.