52. Chylomicrons are transported from intestinal epithelial cells into the lymphatic system. Which of the following best describes their composition and initial transport pathway?
(A) Composed of triglycerides, phospholipids, and proteins, chylomicrons are formed in the lumen of the small intestine and enter the lacteals by active transport.
(B) Composed of re-formed triglycerides coated with phospholipids, cholesterol, and proteins, chylomicrons exit epithelial cells via exocytosis and first enter a lacteal.
(C) Composed of fatty acids and monoglycerides coated with cholesterol and proteins, chylomicrons exit epithelial cells and are directly absorbed into the capillaries of the villus.
(D) Composed of re-formed triglycerides and bile salts, chylomicrons are formed in epithelial cells and actively transported into the hepatic portal vein.
(E) Composed of triglycerides, cholesterol, and amino acids, chylomicrons exit epithelial cells via diffusion and first enter a lymphatic vessel called a capillary.
統計: A(1), B(4), C(2), D(0), E(0) #3852906
詳解 (共 2 筆)
chylomicron由三酸甘油脂、磷脂、蛋白質組成,在小腸的上皮細胞內組織後入乳糜管