Content
The irritability of living beings is the reaction of a stimulus (be it external or internal) in which case it modifies the behavior of living beings that are subjected to them.
Irritability in living beings specifically refers to the homeostatic capacity (the ability to maintain a stable internal condition of the organism to favor its adaptability to the environment). This allows their survival.
The response that living beings present is related to the adaptability of said living being to the surrounding environment.
Irritability is, then, a type of adaptive response of all living things from bacteria to humans. However, what varies is the response of said irritability. Irritability is also understood as the ability of a living being to react negatively and react to said stimulus.
- See also: Examples of Adaptation of living beings.
There are two types of stimuli; the external and internal. Internal stimuli are those coming from within the body itself. On the other hand, external stimuli are those that come from the environment where said organism is found.
Multicellular organisms
For a living being to be able to carry out a type of reaction such as irritability, there must be two processes: coordination and organic integration. In living beings, those responsible for both processes are the endocrine system and the nervous system.
The endocrine system it works through chemicals called hormones. This system processes stimuli from inside the body (internal stimuli).
The nervous system, receives stimuli from the external environment of the body through the senses.
The vegetables
On the other hand, vegetables have a hormonal coordination and integration system based on phytohormones or plant hormones.
The cells
Unicellular organisms do not show coordination and integration. However, they have irritability as well.
Examples of irritability in living things
- Running to protect yourself from danger
- When the human heart flutters after a light walk or exercise.
- When bacteria modify the reaction rate of their cell division
- When vegetables change the direction of their stems based on the search for natural light, shade, water, etc.
- Cover your face if there is an explosion nearby
- Give a kiss to a loved one
- Defecation or vomiting after eating spoiled food
- Love
- Crying
- The fear
- The movement of a muscle
- Redness of the skin from contact with any corrosive agent
- Entering a dimly lit room and suddenly a bright light comes on
- The row
- Empathy
- The envy
- The wrath
- Mucus that causes a cold or flu
- The sorrow
- Laughter
- Sweating
- The sadness
- The pupils when dilating when there is little light or when contracting when there is much light
- To blink
- Itchy mouth or heartburn after eating spicy foods
- Remove your hand from a heat source after feeling the irradiation and possible burn.
- Scratching the skin when the living thing is itchy
- Have diarrhea
- To sigh
- Cover your ears after a deafening noise
- Be cold and shiver
- Cough
- A sneeze
- A scare
- A splinter stuck in it that causes skin irritation
- A mental illness such as schizophrenia or delirium
- An angry reaction from a human being
- A verbal response is also an irritability of the body
- Airways affected after pepper spray inhalation
- Barf
