Question

1. the double-sac membrane that covers each lung and lines the thoracic cavity is the:

○ pleura
○ peritoneum
○ mediastinum
○ pericardium

1. the medical term hypoxia means:

○ deficient oxygen in the blood
○ deficient carbon dioxide in the blood
○ excessive oxygen in the blood
○ excessive carbon dioxide in the blood

Explanation:

Question 3

To solve this, we analyze each option:

• Pleura: A double - sac membrane that covers the lungs and lines the thoracic cavity.
• Peritoneum: Lines the abdominal cavity and covers abdominal organs, not related to lungs.
• Mediastinum: The central compartment of the thoracic cavity, not a membrane covering lungs.
• Pericardium: Membrane around the heart, not lungs.

Analyze the meaning of "hypoxia":

• "Hypo - " means deficient or below normal, and "oxia" relates to oxygen. So hypoxia means deficient oxygen in the blood.
• Deficient carbon dioxide is not related to hypoxia.
• Excessive oxygen is hyperoxia, not hypoxia.
• Excessive carbon dioxide is hypercapnia, not hypoxia.

Answer:

A. pleura

Question 4