<span>A nonspecific (in the way it affects lots of aspects of mind and body) reaction to the demands around us. The higher the demand is perceived by the person the higher the stress.</span>
Answer:
A) Changes in cell shape, size, and organization
Explanation:
Changes in cell shape, size and organisation suggests that a population of cells have changed identity. This could indicate the presence of mutations in the DNA that could lead to uncontrolled cell proliferation or abnormal cell types. These are indicative of tumorigenesis and potential pre-cancerous cells.
<span>I think you may be explaining Myocardial ischemia.
This occurs when the blood going to your is reduced or stopped which prevents oxygen from traveling into your heart. Whenever your heart stops getting blood the mussels begin to deteriorate. This normally happens from coronary arteries aka blockages in your arteries.
</span>I hope this helps. :)
The cells of the SA node at the top of the heart are known as the pacemaker of the heart because the rate at which these cells send out electrical signals determines the rate at which the entire heart beats (heart rate). The cells that create these rhythmic impulses, setting the pace for blood pumping, are called pacemaker cells, and they directly control the heart rate. They make up the cardiac pacemaker, that is, the natural pacemaker of the heart. Hope this helps!
