Which term describes a lack of oxygen reaching tissues?

Which term describes a lack of oxygen reaching tissues?

• A. Anemia
• B. Dyspnea
• C. Anoxia
• D. Angina

Answer: (C)

Anoxia is the absence of oxygen reaching tissues. It happens when oxygen cannot be delivered by the blood to cells, such as in severe respiratory failure, airway obstruction, or poor circulation. Anemia lowers the blood’s oxygen-carrying capacity but doesn’t necessarily mean no oxygen is reaching tissues. Dyspnea is the feeling of difficult or labored breathing, not a description of tissue oxygenation. Angina is chest pain caused by reduced blood flow to the heart muscle, indicating ischemia rather than a general lack of oxygen to tissues. So, the term that best describes a lack of oxygen reaching tissues is anoxia.

Anoxia is the absence of oxygen reaching tissues. It happens when oxygen cannot be delivered by the blood to cells, such as in severe respiratory failure, airway obstruction, or poor circulation. Anemia lowers the blood’s oxygen-carrying capacity but doesn’t necessarily mean no oxygen is reaching tissues. Dyspnea is the feeling of difficult or labored breathing, not a description of tissue oxygenation. Angina is chest pain caused by reduced blood flow to the heart muscle, indicating ischemia rather than a general lack of oxygen to tissues. So, the term that best describes a lack of oxygen reaching tissues is anoxia.