Which type of effects occur at the area of contact such as skin or respiratory tract?

Local effects refer to the reactions that occur at the site of contact with a substance, such as when a herbicide comes into direct contact with the skin or is inhaled into the respiratory tract. These effects are often characterized by immediate, localized symptoms, such as irritation, redness, or inflammation.

When a herbicide is applied, it can interact with cells or tissues in the area where it is directly applied or where it comes into contact, leading to localized responses. This is essential for understanding the potential hazards associated with applying these chemicals, as knowing how they affect the body at the point of contact helps in implementing safety measures and choosing appropriate personal protective equipment.

In contrast, systemic effects would involve reactions that occur after the substance has entered the circulatory system and affects various organs throughout the body, while neurological effects specifically relate to impacts on the nervous system, and chronic effects pertain to long-term consequences resulting from repeated or prolonged exposure.