Which enzyme is found in high concentrations on the luminal surface of pulmonary capillary endothelial cells?
Show answer and explanation
Correct answer: Angiotensin-converting enzyme (ACE)
ACE is bound to the luminal surface of the pulmonary endothelium. It plays a vital systemic role by converting Angiotensin I to the potent vasoconstrictor Angiotensin II and inactivating bradykinin.
Keep practicing
More Pulmonary Capillaries questions
- The 'Blood-Air Barrier' (respiratory membrane) includes which of the following components?
- What is the metabolic role of pulmonary capillaries regarding serotonin (5-HT)?
- Which of the following helps prevent the collapse of pulmonary capillaries during respiratory movements?
- In cases of left-sided heart failure, what histological change is often seen involving pulmonary capillaries?
- Which cell type is located within the capillary lumen and is responsible for transporting oxygen?
- Caveolae (plasmalemmal vesicles) are abundant in pulmonary endothelial cells. What is their likely function?