What is the primary role of the gut microbiome in human health?
To transport oxygen in the bloodstream
To regulate blood pressure
To produce insulin
To aid in digestion and nutrient absorption
The Correct Answer is D
A. To transport oxygen in the bloodstream: Oxygen transport is the role of red blood cells and hemoglobin, not the gut microbiome. The microbiome does not participate in carrying oxygen to tissues.
B. To regulate blood pressure: While some gut microbes may indirectly influence blood pressure through metabolic and inflammatory pathways, regulating blood pressure is not their primary function.
C. To produce insulin: Insulin is produced by the pancreas. The gut microbiome does not produce insulin, though it can affect glucose metabolism indirectly.
D. To aid in digestion and nutrient absorption: The gut microbiome consists of trillions of microorganisms that help break down complex carbohydrates, synthesize certain vitamins, and improve nutrient absorption. It also contributes to gut health and immune function, making digestion and nutrient utilization its primary role.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. To provide immediate defense against all pathogens: Nonspecific, or innate, immunity acts as the first line of defense by responding rapidly to pathogens. It includes barriers like skin, mucous membranes, and phagocytic cells that act regardless of the pathogen type.
B. To enhance the body's inflammatory response: While nonspecific immunity involves inflammation, enhancing the inflammatory response is a mechanism rather than the primary role. Its main function is broad and immediate defense.
C. To target specific pathogens based on antigens: Targeting specific pathogens is a function of specific (adaptive) immunity, which recognizes antigens and produces tailored responses.
D. To produce memory cells for long-term immunity: Memory cell production is part of adaptive immunity. Nonspecific immunity does not have memory and reacts the same way to repeated exposures.
Correct Answer is A
Explanation
A. Bronchi: Wheezing and difficulty breathing often result from bronchoconstriction or inflammation in the bronchi. These large airway passages are critical for directing airflow to the lungs, and obstruction here causes audible wheezing.
B. Diaphragm: The diaphragm is the primary muscle for ventilation, but dysfunction would cause general breathing difficulty, not wheezing.
C. Alveoli: Alveoli are responsible for gas exchange; problems here usually cause hypoxia or shortness of breath, but wheezing is less characteristic.
D. Pharynx: The pharynx serves as a passageway for air and food; obstruction here may cause stridor but not the typical wheezing associated with lower airway issues.
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