a-diagram-shows-ethanol-molecules-crossing-the-intestinal-epithelium-into-capill

Question

A diagram shows ethanol molecules crossing the intestinal epithelium into capillaries. Which physiological route correctly follows these molecules next and explains why the liver is the first major metabolic site?

Accepted Answer

Capillaries drain into the portal vein, directing absorbed ethanol-rich blood to the liver where hepatic enzymes metabolize ethanol before it reaches systemic circulation.

Answer

Absorbed ethanol enters the enteric nervous system which chemically modifies ethanol locally, then slowly releases it into systemic veins, minimizing hepatic exposure.

Answer

Capillaries feed into lymphatic vessels that transport ethanol to the thoracic duct, which then deposits ethanol-rich lymph into the systemic circulation bypassing first-pass hepatic metabolism.

Answer

Intestinal capillary blood is routed directly to the renal circulation for initial filtration because the kidneys filter small molecules prior to hepatic processing.