What is the role of oxygen in a cellular respiration?
It acts as a nutrient source.
It forms carbonic acid.
It is the final electron acceptor.
It directly generates AТР.
The Correct Answer is C
A. It acts as a nutrient source: Oxygen is not a nutrient and does not provide calories or structural substrates for the body. Nutrients such as glucose, fatty acids, and amino acids supply the carbon skeletons and energy used in cellular respiration, while oxygen plays a distinct role in the electron transport process.
B. It forms carbonic acid: Carbonic acid is formed when carbon dioxide combines with water, not oxygen. While oxygen participates in oxidative metabolism that produces carbon dioxide, it is not directly responsible for carbonic acid formation in cellular respiration.
C. It is the final electron acceptor: In aerobic cellular respiration, oxygen serves as the terminal electron acceptor in the electron transport chain within the mitochondria. It accepts electrons and hydrogen ions to form water, allowing oxidative phosphorylation to continue and enabling efficient ATP production. Without oxygen, the electron transport chain halts.
D. It directly generates ATP: Oxygen does not directly synthesize ATP. ATP is produced through oxidative phosphorylation by ATP synthase, which uses the proton gradient generated by electron transport. Oxygen’s role is indirect but essential in sustaining the gradient by accepting electrons at the end of the chain.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Correct answer: False
Asthma prevalence varies across different racial and ethnic groups. Epidemiological studies show that asthma is more prevalent among African American and Hispanic populations compared with Caucasian individuals. Factors such as genetics, environmental exposures, socioeconomic status, and access to healthcare contribute to these differences. While asthma can affect people of any race, assuming it is most common in Caucasians is inaccurate. Public health data emphasize that minority populations often experience higher rates of asthma morbidity and mortality, highlighting the importance of targeted prevention and management strategies in these groups.
Correct Answer is A
Explanation
Correct answer: True
Forced expiratory volume (FEV), particularly FEV₁, measures the volume of air a person can forcibly exhale in one second and is a key indicator of airway obstruction. During an asthma attack, bronchoconstriction, airway inflammation, and mucus production narrow the airways, increasing resistance to airflow. This obstruction reduces the amount of air expelled rapidly, leading to a decreased FEV. Monitoring FEV is essential in asthma management to assess the severity of airway obstruction and the effectiveness of bronchodilator therapy. Therefore, a reduction in FEV during an asthma exacerbation
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.