Stress is a fact of nature in which forces from the inner or outer world affect the
individual, either their emotional or physical, or both. Individuals respond to stress
in a way that affects the individual, as well as their environment. Due to the
overwhelming amount of stress in our modern lives, we often consider stress a
negative experience, but from a biological perspective, stress can be a neutral,
negative or positive experience. . In general, stress is related to both external and
internal factors. External factors include your physical environment, including your
job, your relationships with others, your home, and all the situations, challenges,
difficulties, and expectations that you have. face every day. Internal factors
determine your body's ability to respond and deal with external stressors. Internal
factors that affect your ability to handle stress include your nutritional status, your
general and physical health, your mental state, and the amount of sleep and rest
you receive. The stress caused evolutionary changes (the development and natural
selection of species over time). Thus, the species best adapted to the stressors
(stressors) survived and evolved into the plant and animal worlds we observe now.
Humans are the most adaptable creatures on the planet due to the evolution of the
human brain, specifically the part called the neocortex. This adaptability is largely
due to the changes and stressors we have come to terms with and master.
Therefore, unlike other animals, we can live in any climate or ecosystem, at
,different altitudes, and avoid the dangers of predators. Moreover, we have learned
to live in the air, in the sea and even in space, where no living thing has ever
existed. So what's so bad about stress?
Stress management tips
In general, stress is related to both external and internal factors. External factors
include your physical environment, your work, your relationships with others, your
home, and all the situations, challenges, difficulties and expectations that arise. you
have to face every day. Internal factors determine your body's ability to respond
and deal with external stressors. Internal factors that affect your ability to manage
stress include your nutritional status, general and physical health, your mental
state, and your ability to manage stress through techniques relaxation techniques or
other strategies, as well as the amount of sleep and rest you get. Therefore, stress
management can involve learning tips to change the external factors you face or
internal factors that strengthen your ability to cope with what comes your way.
your way. What were the first scientific studies on stress? The key to
understanding the negative aspects of stress is the concept of homeostasis (the
body's internal environment), first introduced by the French physiologist Claude
Bernard. In this concept, he described the principles of dynamic equilibrium. In
dynamic equilibrium, constancy, a steady state (situation) in the body's internal
environment, is essential for survival.Therefore, external changes in the
, environment or external forces that change the internal balance must be reacted to
and compensated for if the organism is to survive. Examples of such external
forces include temperature, oxygen concentration in the air, the expenditure of
energy, and the presence of predators. In addition, diseases are also stressors that
threaten the constancy of the milieu interieur.
The neurologist Walter Cannon coined the term homeostasis to further define the
dynamic equilibrium that Bernard had described. He also was the first credited
with recognizing that stressors could be emotional, as well as physical. Through
his experiments, he demonstrated the "fight or flight" response that man and other
animals share when threatened. Further, Cannon traced these reactions to the
release of powerful neurotransmitters from a part of the adrenal gland, the medulla.
(Neurotransmitters are the body's chemicals that carry messages to and from the
nerves.) The adrenal medulla secretes two neurotransmitters, epinephrine (also
called adrenaline) and norepinephrine (noradrenaline), in the response to stress.
The release of these neurotransmitters leads to the physiologic effects seen in the
fight or flight response, for example, a rapid heart rate, and increased alertness.
Hans Selye, another early scientist who is known for his studies of stress, extended
Cannon's observations. He included the pituitary gland, a small gland at the base of
the brain, as part of the body's stress response system. He described how this gland
controls the secretion of hormones (for example, cortisol) that are important in the
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