JBL Medical Practice Test

Question: 1 / 400

What is the role of the immune system?

To circulate blood throughout the body

To aid in digestion

To defend the body against pathogens and disease

The immune system plays a crucial role in defending the body against pathogens such as bacteria, viruses, fungi, and parasites, as well as against diseases like cancer. It is composed of various cells, tissues, and organs that work together to recognize and eliminate harmful invaders. This protective function is vital for maintaining overall health and is the reason why option C is the correct answer.

The other choices do not accurately represent the function of the immune system. Circulating blood throughout the body is the responsibility of the cardiovascular system, whereas aiding in digestion is primarily the function of the digestive system. Regulating hormones is the role of the endocrine system. Therefore, the unique role of the immune system in defending against diseases and pathogens distinguishes it from these other bodily systems.

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To regulate hormones

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