KSU FNDH 400 Exam 2 latest verified solution 2023 A+ GRADED

Life of Enterocytes - In the crypts of Lieberkuhn (the pits between villi), stem cells are produced which can create enterocytes. As the cells mature, they migrate to the top of the villi, and thus the most mature are on the tips of the villi. 72 hours after an enterocyte enters the villi from the crypt, they are "sloughed off" and excreted in feces. If not sloughed off, they will be digested and the components (proteins and lipids) will be taken up by remaining enterocytes still on villi. Uptake - Into enterocyte Absorption - Enterocyte -- Circulation Three types of Passive Transport - Simple Diffusion Osmosis Facilitated Diffusion Two Types of Active Transport - Active Carrier Transport Endocytosis Simple Diffusion - Movement of solutes from an area of high concentration to an area of low without the help of a protein Osmosis - Water moves from an area of high concentration to an area of low without the help of a protein