Certified Electronic Health Records Specialist (CEHRS) Practice Exam

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What is the primary function of the immune system?

Circulation of blood
Production of hormones
Energy storage
Protection against infections

The correct answer is: Protection against infections

The primary function of the immune system is to provide protection against infections. This system is essential for identifying and responding to pathogens such as bacteria, viruses, and other foreign substances that can cause disease. The immune system comprises various cells, tissues, and organs that work together to recognize, attack, and eliminate these harmful invaders, ensuring the body's overall health and ability to combat diseases. In the context of this question, while blood circulation, hormone production, and energy storage are important physiological functions, they are not directly related to the activities of the immune system. The immune system's specific role in defending against infections highlights its critical importance in maintaining homeostasis and promoting health.