Colorado CNA Practice Exam

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Which of the following is a function of the immune system?

  1. Helps with digestion of nutrients

  2. Maintains blood pressure

  3. Protects against the invasion of foreign substances and pathogens

  4. Regulates hormonal activity

The correct answer is: Helps with digestion of nutrients

The immune system plays a crucial role in protecting the body from infections and diseases. Its primary function is to identify and combat foreign substances such as bacteria, viruses, and other pathogens that can pose a threat to health. This protective mechanism is essential for maintaining overall health and preventing illness, making the statement about the immune system's protective capabilities accurate. The other functions listed in the options do not pertain to the immune system. Digestion is mainly handled by the gastrointestinal system, while blood pressure is regulated by the cardiovascular system. Hormonal regulation falls under the endocrine system’s responsibilities. Understanding the specific functions of various systems in the body helps clarify the role of the immune system in promoting health and fighting off illness.

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