Question

naturally acquied passive immunity is associated with which of the following
receiving booster shots
vaccination
intravenous injection of antibodies
transfer of igg from mother to fetus
question 15 (1 point)
all of the following are effects of histamine except
redness
swelling
pain
fever
vasodialation

Explanation:

First Question (Naturally acquired passive immunity):

• Receiving booster shots: Booster shots are a form of active immunity (vaccination - induced, body makes antibodies), not passive.
• Vaccination: Vaccination (including boosters) is active immunity as the body produces antibodies in response to vaccine antigens.
• Intravenous injection of antibodies: This is artificial passive immunity (administered externally, not natural).
• Transfer of IgG from mother to fetus: This is naturally acquired passive immunity, as antibodies pass from mother to fetus (e.g., across placenta) without the fetus producing them, and it occurs naturally.

• Redness: Histamine causes vasodilation, leading to redness (erythema) in inflammation.
• Swelling: Histamine increases vascular permeability, causing fluid leakage and swelling (edema).
• Pain: Histamine - mediated inflammation can stimulate nerve endings, causing pain.
• Fever: Fever is caused by pyrogens (e.g., cytokines like IL - 1), not directly by histamine.
• Vasodilation: Histamine directly causes vasodilation of blood vessels.

Answer:

D. transfer of IgG from mother to fetus

Question 15 (Effects of histamine EXCEPT):