Question

Which are the physical (P), chemical (C), and biological (B) immune responses?

a. P: complement system; C: saliva; B: coughing
b. P: coughing; C: saliva; B: complement system
c. P: coughing; C: sneezing; B: complement system
d. P: complement system; C: saliva; B: sneezing

Answer 1

The correct answer is- b. P: coughing; C: saliva; B: complement system

Step-by-step explanation:

Body show physical, chemical and immunological response against foreign antigen to protect the body from them. Coughing, sneezing, skin, respiratory tract, gastrointestinal tract comes under physical barrier. They restrict the bacteria to get into the body.

Chemical barrier includes saliva, tear, sweat, mucus that helps in killing the pathogen at the outer body surface. Antibodies, immune cells, complement system comes under immune response which helps in destroying the pathogen which are present in the body.