Question

question histamine is produced by mast cells upon tissue injury. histamine is a vasodilator. what is the purpose of increasing blood flow to the site of injury during inflammation? select all that apply to remove the waste products and debris to reduce the flow of defense cells to the site of injury to reduce the local temperature in order to reduce pain to increase the delivery of oxygen and nutrients

Explanation:

1. Analyze "To remove the waste products and debris": Increased blood flow brings in immune cells and helps carry away waste/debris from injury site, so this is correct.
2. Analyze "To reduce the flow of defense cells to the site of injury": Increased blood flow actually increases defense cell (like white blood cells) delivery, so this is incorrect.
3. Analyze "To reduce the local temperature in order to reduce pain": Vasodilation and increased blood flow often cause local heat (inflammation - red, warm), so this is incorrect.
4. Analyze "To increase the delivery of oxygen and nutrients": Blood carries oxygen and nutrients, so more blood flow means more delivery to support repair, this is correct.

Answer:

• To remove the waste products and debris
• To increase the delivery of oxygen and nutrients