A social psychologist would be interested in how groups interact.
Explanation:
Health, population, and environment are interrelated in many ways.
If we are observing one individual person and the health of that person we can see that the health of this individual is associated with the environment where that person is living. Rapid population growth is provoking massive environmental degradation because where there are much people, the environment can face great degradation.
Cardiac-muscle cells are striated<span>, and are a lot like skeletal-muscle </span>cells<span> except that in cardiac muscle, the fibers are </span>interconnected<span>. The </span>sarcoplasmic reticulum<span> of cardiac-muscle cells is not as well-developed as that of skeletal-muscle cells. Cardiac-muscle contraction is </span>actin-regulated<span>, meaning that the calcium ions come both from the sarcoplasmic reticulum (as in skeletal muscle) and from outside the cell (as in smooth muscle). Otherwise, the chain of events that occurs in cardiac-muscle contraction is similar to that of skeletal muscle.</span>
