Q. Note the following words. I. Skin II. Phagocytes III.B-cells IV. Inflammation V. Antibodies VI. T-cells VII. Fever VIII. Antimicrobial proteins IX. NK-cells X. Secretions Identify the factors involved in second line of defence.
A) II, IV, VII and IX
B) II, III, V and IX
C) IV, VI, VIII and X
D) III, V, VII and VIII
Explanation
The second line of non-specific defence is primarily dependent upon neutrophils and macrophages, phagocytic white cells (phagocytes) in blood and lymph. Natural killer cells (NK-cells) also participate in it. The temperature response results in a fever that stimulates phagocytosis, inhibits microbial growth and reduces blood iron levels.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.