How popular is Shula? Shula is a rare first name for females but a somewhat popular surname for all people (#88825 out of 150436, Top 59%). (2000 U.S. DEMOGRAPHICS)
How chronic stress is harming our DNA. Elissa Epel is studying how personality, stress processes and environment affect our DNA â and how we might lessen damaging effects. Money problems, a heavy work load, caregiving â such increasingly common pressures have helped make stress a part of modern American life.
One major internal environmental influence that affects gene expression is gender, as is the case with sex-influenced and sex-limited traits. Similarly, drugs, chemicals, temperature, and light are among the external environmental factors that can determine which genes are turned on and off, thereby influencing the way an organism develops and functions.