Question

drag each tile to the correct box.
match each of the four barriers of innate immunity with its mode of action.
anatomical barrier physiological barrier phagocytic barrier inflammatory barrier
secretion of sweat, saliva,
and tears
secretion of chemicals
signaling to macrophages
changes in ph and
temperature

Explanation:

1. Anatomical barrier: Involves physical structures (like skin, mucous membranes) and secretions (sweat, saliva, tears) that block pathogens. So "secretion of sweat, saliva, and tears" matches anatomical barrier.
2. Physiological barrier: Includes chemical secretions (e.g., enzymes in secretions, antimicrobial peptides) to inhibit pathogens. So "secretion of chemicals" matches physiological barrier.
3. Phagocytic barrier: Involves phagocytes (like macrophages) that engulf pathogens. Signaling to macrophages relates to activating phagocytic cells, so "signaling to macrophages" matches phagocytic barrier.
4. Inflammatory barrier: Inflammation brings changes like increased blood flow, leading to changes in pH and temperature at the site to combat infection. So "changes in pH and temperature" matches inflammatory barrier.

Answer:

• "secretion of sweat, saliva, and tears" → anatomical barrier
• "secretion of chemicals" → physiological barrier
• "signaling to macrophages" → phagocytic barrier
• "changes in pH and temperature" → inflammatory barrier