Causes of Heart Palpitations. Many things can cause heart palpitations. In the vast majority of cases, the cause is either related to your heart or is unknown. Non-heart-related causes of palpitations include: 1  Strong emotions such as anxiety, fear, or stress; palpitations often occur during panic attacks.2  Vigorous physical activity.therosclerosis is the process of narrowing and hardening of the arteries due to plaque buildup in the inner lining of arteries. It's the key cause of heart attacks and strokes and the No. 1 killer in the U.S. When it comes to developing health risks from atherosclerosis, some people are at higher risk than others.
The cell nucleus is a double membraneâbound organelle that contains the genetic information of the cell packaged in the form of chromatin. The nucleus is a characteristic feature of most eukaryotic cells.
The nucleus of the cell contains much of the DNA of the cell, and it regulates the activities of that cell, whatever those activities are.The nucleus is composed of chemical structures that orchestrate chemical reactions that make the cell function.he nucleus contains the DNA of the cell and this is vital for cell division and also for making the proteins that the cell needs to function. 3 people found this useful. Edit. Share to: 1  The Periodic Table of Elements Life is sustained by a number of chemical elements.