Question

you have 2 questions remaining to reach your goal.
which of the following statements is true concerning passive immunity?
a passive immunity can result from immunization.
b passive immunity can last a lifetime.
c passive immunity results when an immune response to a pathogen produces memory cells.
d passive immunity may be acquired by a fetus through its mother’s blood.

Explanation:

• Option a: Immunization (active immunization) involves stimulating the body's own immune response, so passive immunity doesn't result from it.
• Option b: Passive immunity is temporary as it doesn't involve the body's immune system developing memory cells, so it can't last a lifetime.
• Option c: Memory cells are produced in active immunity (when the body responds to a pathogen), not passive immunity.
• Option d: A fetus can acquire passive immunity (antibodies) from the mother's blood (e.g., IgG antibodies crossing the placenta), which is correct.

Answer:

d. Passive immunity may be acquired by a fetus through its mother’s blood.