Question 221 of 446
The cell-mediated immune response (CMI) is mediated by ____-lymphocytes.
The T-lymphocytes mediate CMI.
Human Health and Disease MCQs
Class XII Biology • NCERT Based • NEET Practice
Question 222 of 446
The ____ immune response is responsible for graft rejection during organ transplantation.
The cell-mediated immune response is responsible for the graft rejection.
Question 223 of 446
When a host is exposed to antigens and produces antibodies itself, this is called ____ immunity.
When a host is exposed to antigens, and antibodies are produced in the host body, this is called active immunity.
Question 224 of 446
When ready-made antibodies are directly given to protect the body against foreign agents, it is called ____ immunity.
When ready-made antibodies are directly given, it is called passive immunity.
Question 225 of 446
Colostrum secreted by the mother has abundant antibodies of the ____ type to protect the infant.
The yellowish fluid colostrum has abundant antibodies (IgA) to protect the infant.
Question 226 of 446
In cases like tetanus where a quick response is needed, patients are directly injected with preformed antibodies or ____.
In tetanus, we need to directly inject the preformed antibodies, or antitoxin.
Question 227 of 446
The hepatitis B vaccine is produced from ____ using recombinant DNA technology.
Hepatitis B vaccine is produced from yeast using recombinant DNA technology.
Question 228 of 446
The exaggerated response of the immune system to certain antigens present in the environment is called ____.
The exaggerated response of the immune system to certain antigens present in the environment is called allergy.
Question 229 of 446
The substances that provoke an allergic immune response are called ____.
The substances to which such an immune response is produced are called allergens.
Question 230 of 446
Allergy symptoms arise due to the release of chemicals like histamine and ____ from mast cells.
Allergy is due to the release of chemicals like histamine and serotonin from the mast cells.