Question

question 8
1 pts
histamine
prevents viral reproduction.
increases the activity of macrophages.
makes the capillary more permeable (leaky).
kills bacteria.

Explanation:

Histamine is a chemical released during an immune response. It causes blood vessels (including capillaries) to dilate and become more permeable. This allows more immune - related substances (like white blood cells) to reach the site of infection or injury.

• Preventing viral reproduction is more related to interferons.
• Increasing macrophage activity is not the main function of histamine.
• Killing bacteria is more associated with substances like lysozyme.

Answer:

makes the capillary more permeable (leaky).