Antihistamines That Are H₁-Antagonists Are Least Effective at Competitively Blocking

question 53

Multiple Choice

Antihistamines that are H₁-antagonists are least effective at competitively blocking the effect of histamine at which of the following sites?

• A)Nonvascular smooth muscle (bronchial)
• B)Vascular smooth muscle (vessels)
• C)Capillary permeability
• D)Nerve endings

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Definitions:

Salpingitis

An inflammation of the fallopian tubes, which can be caused by infection and may lead to infertility if left untreated.

Fallopian Tube

One of a pair of tubes along which eggs travel from the ovaries to the uterus in the female reproductive system.

Pregnancy

The condition of having a developing embryo or fetus in the uterus, marked by various physical and hormonal changes in the body, typically lasting around 40 weeks from the last menstrual period.

Pyuria

The presence of pus in the urine, typically indicating an infection or inflammation in the urinary tract.