While Hiking, You Must Push Aside Thick Branches That Are

Multiple Choice

While hiking, you must push aside thick branches that are near your face. One of them rips the skin on your arm and you begin to bleed from the cut. Which of the following plays an important role in initially protecting you from infection?

A) nonspecific antibodies
B) barriers such as dead skin cells and mucus because they are part of the innate immune system
C) increased production of certain hormones and changes in microcirculation
D) memory cells because they are part of the adaptive immune system