Final answer:
Positive chemotaxis is a feedback system that signals leukocyte migration to damaged areas and is a true positive feedback mechanism, drawing more leukocytes as chemical signals increase.
Step-by-step explanation:
Positive chemotaxis is indeed a feedback system that signals leukocyte migration into damaged areas. This process is characterized as a positive feedback mechanism because more leukocytes are recruited to the site of injury or infection as the chemical signals become stronger. These chemical signals or chemokines are chemotactic cytokines that attract specific subsets of leukocytes to infections, damaged tissues, and sites of inflammation. The concentration of these signals increases as the number of pathogens or the extent of the injury increases, drawing in an even greater number of white blood cells. Therefore, the statement is true.