Innate immunity is a ____ type of defence that is present at the time of birth.
Innate immunity is non-specific type of defence, that is present at the time of birth.
Question 212 of 446
📘 CLASS XII
The skin on our body is the main ____ barrier preventing the entry of micro-organisms.
Skin on our body is the main physical barrier preventing entry of micro-organisms.
Question 213 of 446
📘 CLASS XII
____ in the mouth is an example of a physiological barrier that prevents microbial growth.
Acid in the stomach, saliva in the mouth, tears from eyes—all prevent microbial growth.
Question 214 of 446
📘 CLASS XII
____ leukocytes (like neutrophils and monocytes) and natural killer cells act as cellular barriers.
Certain types of leukocytes like polymorpho-nuclear leukocytes (PMNL-neutrophils), monocytes, and natural killer cells can phagocytose and destroy microbes.
Question 215 of 446
📘 CLASS XII
Virus-infected cells secrete proteins called ____ which protect non-infected cells from further viral infection.
Virus-infected cells secrete proteins called interferons which are cytokine barriers.
Question 216 of 446
📘 CLASS XII
The highly intensified response elicited upon subsequent encounter with a pathogen is called the secondary or ____ response.
Subsequent encounter with the same pathogen elicits a highly intensified secondary or anamnestic response.
Question 217 of 446
📘 CLASS XII
The ____-lymphocytes produce an army of proteins called antibodies to fight pathogens.
The B-lymphocytes produce an army of proteins called antibodies to fight pathogens.
Question 218 of 446
📘 CLASS XII
An antibody molecule consists of two small light chains and two longer heavy chains, represented as ____.
An antibody molecule has two small light chains and two longer heavy chains, represented as H₂L₂.
Question 219 of 446
📘 CLASS XII
IgA, IgM, IgG, and ____ are some of the types of antibodies produced in the human body.
IgA, IgM, IgE, IgG are some of the types of antibodies produced.
Question 220 of 446
📘 CLASS XII
The antibody-mediated response is called the ____ immune response because the antibodies are found in the blood.
Because antibodies are found in the blood, the response is called humoral immune response.
