which are correct examples of physical (p), chemical (c), and biological (b) barriers?\np: complement…

which are correct examples of physical (p), chemical (c), and biological (b) barriers?\np: complement system; c: saliva; b: coughing\np: coughing; c: saliva; b: complement system\np: coughing; c: sneezing; b: complement system\np: complement system; c: saliva; b: sneezing

which are correct examples of physical (p), chemical (c), and biological (b) barriers?\np: complement system; c: saliva; b: coughing\np: coughing; c: saliva; b: complement system\np: coughing; c: sneezing; b: complement system\np: complement system; c: saliva; b: sneezing

Answer

Brief Explanations:

Physical barriers are mechanical defenses. Coughing is a physical action expelling foreign - substances. Chemical barriers contain substances that can break down pathogens. Saliva has enzymes like lysozyme. The complement system is a biological defense mechanism made of proteins in the blood that help destroy pathogens. Sneezing is a physical action like coughing.

Answer:

P: coughing; C: saliva; B: complement system