What is the role of antibodies in the immune response?
Destroying infected cells
Attracting white blood cells to the site of infection
Producing hormones to activate the immune system
Regulating body temperature
The Correct Answer is A
Explanation: Destroying infected cells. Antibodies are produced by B cells in response to a specific pathogen and play a crucial role in identifying and neutralizing the invading pathogens, including infected cells.
Incorrect choices:
b. Attracting white blood cells to the site of infection is not the primary role of antibodies. White blood cells are attracted to the site of infection by chemical signals released by damaged tissues or pathogens.
c. Antibodies do not produce hormones. Hormones are chemical messengers produced by endocrine glands to regulate various bodily functions.
d. Antibodies do not regulate body temperature. Body temperature regulation is mainly controlled by the hypothalamus in the brain.
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Related Questions
Correct Answer is C
Explanation
Explanation: Healthcare workers are recommended to receive the hepatitis B vaccine to protect against hepatitis B virus (HBV) infection, which can be transmitted through contact with infected blood or body fluids.
Incorrect choices:
a. The influenza vaccine is recommended annually for healthcare workers to protect against seasonal flu, not hepatitis B.
b. The tetanus toxoid vaccine protects against tetanus, not hepatitis B.
d. The pneumococcal polysaccharide vaccine protects against pneumonia caused by Streptococcus pneumoniae bacteria, not hepatitis B.
Correct Answer is C
Explanation
Explanation: Live attenuated vaccines use a weakened form of the pathogen that is still capable of replicating but does not cause severe illness in healthy individuals. This type of vaccine can provide long-lasting immunity with a single dose.
Incorrect choices:
a. Inactivated vaccines use killed pathogens, not weakened forms.
b. Subunit vaccines use only specific parts of the pathogen, not weakened forms.
d. Toxoid vaccines use inactivated toxins produced by the pathogen, not weakened forms of the pathogen itself.
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