The location of the central chemoreceptor is:
The cerebral cortex
The brain stem
The aorta
The cerebellum
The Correct Answer is B
A. The cerebral cortex is involved in higher brain functions like thinking and voluntary control of breathing but does not contain central chemoreceptors.
B. Central chemoreceptors are located in the medulla oblongata, a part of the brain stem. They detect changes in the pH of cerebrospinal fluid, which reflects CO₂ levels in the blood, and help regulate breathing accordingly.
C. The aorta contains peripheral chemoreceptors, not central ones. These aortic bodies monitor blood oxygen, carbon dioxide, and pH, but they are outside the central nervous system.
D. The cerebellum coordinates motor control and balance and does not play a role in chemoreception.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Compliant is not the term used in COPD. It refers to something that is flexible or yielding, which does not describe the condition.
B. Cumulative could describe the long-term effects of COPD, but it is not the word represented by the "C" in COPD.
C. Congestive is a term often associated with conditions like congestive heart failure, not COPD.
D. Chronic is the correct term. Chronic Obstructive Pulmonary Disease (COPD) refers to a long-term, progressive lung disease that causes difficulty breathing due to airflow obstruction.
Correct Answer is C
Explanation
A. Exhalation is the passive phase of normal breathing and occurs without effort during relaxed respiration. It involves the diaphragm and intercostal muscles relaxing, allowing air to flow out of the lungs.
B. Apnea refers to a temporary cessation of breathing and is not a phase of normal breathing.
C. Inhalation is the active phase of normal, relaxed breathing. It requires energy as the diaphragm contracts and moves downward and the intercostal muscles contract to expand the chest cavity, allowing air to enter the lungs.
D. Expiration is another term for exhalation, which is passive during normal relaxed breathing.
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