What is the primary factor that affects the binding of oxygen (O₂) to hemoglobin?

Correct Answer: A

Rationale: The binding of oxygen (O₂) to hemoglobin is primarily influenced by the partial pressure of oxygen (pO₂). When the pO₂ is high, such as in the alveoli of the lungs, the affinity of hemoglobin for oxygen increases, promoting the formation of oxyhemoglobin. In contrast, at low pO₂ levels in the tissues, oxyhemoglobin dissociates, releasing oxygen for cellular respiration.

Correct Answer: A

Rationale: Workers in industries with high dust production, where the defense mechanism of the body may be overwhelmed, should wear protective masks or respirators. These masks can help filter out dust particles and prevent inhalation, reducing the risk of inflammation and damage to the lungs. Using appropriate personal protective equipment is crucial in minimizing the exposure and potential health hazards associated with occupational respiratory disorders.

Correct Answer: B

Rationale: Pulmonary ventilation is the total volume of air moved in and out of the lungs per minute, calculated as tidal volume (approximately 500 mL) multiplied by respiratory rate (typically 12-20 breaths/min), yielding about 6-10 L/min. The answer key suggests 'B,' but based on standard physiology, 'A' aligns with tidal volume × respiratory rate. Assuming a document error, 'A' is correct, but per key, 'B' is noted.

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.