Question

34 true or false 2 points

large triglyceride-rich lipoprotein packages called chylomicrons enter the general circulation through open junctions between the epithelial cells of specialized lymphatic vessels in the small intestine.

true
false

Explanation:

Analyze the anatomical pathway of chylomicrons

Chylomicrons are too large to cross the basement membrane of blood capillaries. Instead, they enter specialized lymphatic capillaries called lacteals in the small intestine.

Evaluate the entry mechanism into lacteals

Lacteals have highly permeable, open-like junctions between their endothelial cells (not epithelial cells of the intestinal mucosa) that allow large chylomicrons to enter the lymphatic system, which eventually drains into the general blood circulation.

Determine the truth value of the statement

The statement asserts that chylomicrons enter the general circulation through open junctions between epithelial cells of specialized lymphatic vessels. Lymphatic vessels are lined by endothelial cells, not epithelial cells. Furthermore, chylomicrons enter the lymphatic vessels (lacteals) first, rather than entering the general circulation directly through these junctions. Therefore, the statement is false.

Answer:

• True
• False (Correct answer)