Respiration is centrally regulated by the:
Cerebellum
Diencephalon
Cerebral cortex
Brain Stem
The Correct Answer is D
A. The cerebellum is involved in coordinating movement and balance but is not primarily responsible for regulating respiration.
B. The diencephalon is involved in sensory processing and regulation of autonomic functions but does not directly control respiration.
C. The cerebral cortex is involved in voluntary control over breathing (such as when you hold your breath), but the central regulation of breathing is managed by the brainstem.
D. The brainstem (specifically the medulla oblongata and pons) is the primary control center for respiration. It regulates the rate and depth of breathing by responding to levels of oxygen and carbon dioxide in the blood.
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Related Questions
Correct Answer is B
Explanation
A. Carbon dioxide does diffuse into the blood from the alveoli, but oxygen diffuses into the blood from the alveoli, not into the alveoli.
B. Oxygen diffuses from the alveoli into the blood where it binds to hemoglobin in red blood cells, while carbon dioxide diffuses from the blood into the alveoli to be exhaled.
C. Both oxygen and carbon dioxide do not diffuse from the alveoli into the blood at the same time. Only oxygen moves into the blood, and carbon dioxide moves in the opposite direction, from the blood to the alveoli.
D. While carbon dioxide moves from the blood into the alveoli, oxygen moves in the opposite direction, from the alveoli into the blood, so this answer is incorrect.
Correct Answer is C
Explanation
A. Inability to breathe without dyspnea unless sitting upright refers to a postural issue that might be seen in certain respiratory conditions but does not describe Cheyne-Stokes respirations.
B. Shallow breathing alternating with periods of apnea is not characteristic of Cheyne-Stokes respirations. While apnea does occur, the breathing pattern is more varied in depth.
C. Cheyne-Stokes respirations are characterized by a periodic pattern where the depth of breathing alternates between very deep and very shallow breaths, followed by periods of apnea. This is often seen in end-of-life care and is associated with respiratory distress or certain neurological conditions.
D. Rapid respirations that are unusually deep and regular are more consistent with Kussmaul respirations, which are typically seen in conditions like metabolic acidosis, not Cheyne-Stokes.
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