Questions: Multiple Select Question Select all that apply Mucosal-associated lymphoid tissue (MALT) responds to microbes entering through the systems. circulatory urinary skeletal gastrointestinal muscular respiratory

The answer is:

• gastrointestinal
• respiratory

Explanation for each option:

1. Circulatory: Incorrect. The circulatory system is responsible for transporting blood, nutrients, gases, and wastes to and from cells. MALT is not primarily involved in responding to microbes entering through the circulatory system.
2. Urinary: Incorrect. While the urinary system can be a site of infection, MALT is not specifically associated with it. The urinary system has its own local immune defenses.
3. Skeletal: Incorrect. The skeletal system is primarily involved in providing structure and support to the body. It is not a primary entry point for microbes that MALT would respond to.
4. Gastrointestinal: Correct. The gastrointestinal system is a major entry point for microbes, and MALT, including structures like Peyer's patches, is involved in immune responses to pathogens entering through this system.
5. Muscular: Incorrect. The muscular system is responsible for movement and is not a primary entry point for microbes that MALT would respond to.
6. Respiratory: Correct. The respiratory system is another major entry point for microbes, and MALT, including structures like the tonsils and adenoids, is involved in immune responses to pathogens entering through this system.

Summary: Mucosal-associated lymphoid tissue (MALT) responds to microbes entering through the gastrointestinal and respiratory systems.