Which two nutrients are necessary for synthesizing red blood cells?
Choose 2 answers.

A. A wound that allows air into the pleural cavity but not out: This describes a tension pneumothorax, not a primary spontaneous pneumothorax.

B. No underlying lung disease and no inciting event: A primary spontaneous pneumothorax typically occurs in otherwise healthy individuals, often young males, without any known lung disease or trauma.

C. A complication of a medical or surgical procedure: This describes an iatrogenic pneumothorax, not a primary spontaneous pneumothorax.

D. An underlying lung disease as well as air entering the pleural space via ruptured blebs: This describes a secondary spontaneous pneumothorax, typically associated with conditions like COPD.

A. Cells that release histamine during the inflammatory response. Cells that release histamine during inflammation are mast cells, not phagocytic cells.

B. Cells that eat pathogens and destroy them. Phagocytic cells, such as macrophages and neutrophils, engulf and digest pathogens in a process called phagocytosis.

C. Cells in the immune system with four-part receptors shaped like a Y. Cells with Y-shaped receptors are B cells, which produce antibodies, not phagocytes.

D. Cells in the immune system with two chains. T cells have two-part receptors but are not classified as phagocytes.