Class XII · Biology practice

Human Health and Disease MCQs

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446 questions in this collection · Page 23 of 45

Question 221 of 446

📘 CLASS XII

Human Health And Disease

The cell-mediated immune response (CMI) is mediated by ____-lymphocytes.

The T-lymphocytes mediate CMI.

Question 222 of 446

📘 CLASS XII

Human Health And Disease

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

📘 CLASS XII

Human Health And Disease

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

📘 CLASS XII

Human Health And Disease

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

📘 CLASS XII

Human Health And Disease

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

📘 CLASS XII

Human Health And Disease

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

📘 CLASS XII

Human Health And Disease

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

📘 CLASS XII

Human Health And Disease

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

📘 CLASS XII

Human Health And Disease

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

📘 CLASS XII

Human Health And Disease

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.

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