Which of the following statements best describes the primary function of the immune system?
The immune system is responsible for regulating body temperature and blood pressure.
The immune system is involved in digestion and absorption of nutrients from food.
The immune system is responsible for recognizing and defending against foreign invaders, such as pathogens and toxins.
The immune system is involved in producing hormones that control various bodily functions.
The Correct Answer is C
Explanation: The immune system is a complex network of cells, tissues, and organs that work together to identify and respond to foreign substances in the body, including bacteria, viruses, parasites, and toxins. Its primary function is to protect the body from infections and other harmful substances.
Incorrect choices:
a. The regulation of body temperature and blood pressure is primarily controlled by the nervous and endocrine systems, not the immune system.
b. Digestion and absorption of nutrients from food are processes mainly controlled by the digestive system, not the immune system.
d. The production of hormones that control bodily functions is primarily the responsibility of the endocrine system, not the immune system.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Explanation: Booster doses of vaccines are recommended to reinforce and extend the duration of immunity provided by the initial vaccination. They help the immune system to maintain a higher level of protection against the disease over time.
Incorrect choices:
a. The number of antibodies in the blood is not increased by booster doses; rather, the immune system's memory is reinforced.
b. Booster doses do not decrease the risk of adverse reactions; they are given to maintain immunity.
d. Booster doses do not reduce the number of required vaccine doses; they are additional doses given to maintain immunity over time.
Correct Answer is B
Explanation
Explanation:The body's ability to produce antibodies against specific pathogens. Immunity refers to the body's ability to recognize and respond to specific pathogens, such as bacteria or viruses, by producing antibodies that target and neutralize these invaders.
Incorrect choices:
a. The body's ability to tolerate foreign substances without a response is not immunity but rather the concept of immunological tolerance, which prevents the immune system from attacking the body's own cells and tissues.
c. Immunity does not guarantee the prevention of infections, but it provides protection and reduces the severity of infections upon subsequent exposures to the same pathogen.
d. While the immune system is designed to fight off infections, it is not capable of fighting off all types of infections equally. The immune response is specific to the type of pathogen encountered.
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