Which process allows cells to engulf large particles or even other cells by forming vesicles?

Correct Answer: B

Rationale: Phagocytosis engulfs large particles or cells.

Correct Answer: D

Rationale: Skeletal muscle is a type of muscle tissue, not connective tissue, which includes bone, cartilage, and blood.

Correct Answer: D

Rationale: RBCs break down after ~120 days in the spleen (reticulo-endothelial system), yielding bilirubin transported by albumin to the liver; most iron is recycled.

Correct Answer: B

Rationale: Plasma specific gravity (~1.025) is primarily due to proteins (e.g., albumin), not electrolytes.

Correct Answer: C

Rationale: Thrombin (from prothrombin) cleaves fibrinogen, and fibrin monomers polymerize to form clots; heparin inhibits thrombin.