Question

In the small intestine, suspended fat droplets diffuse into cells by endocytosis for their nutrient and mineral content. Which bestdescribes the process in which these nutrients are absorbed during digestion?

a) Protein-lined pits identify needed nutrients and temporarily bind with receptors until fully engulfed into the cell.

b) specialized white cells ingest nutrients outside the cell and diffuse across the cell membrane by active transport.

c) The cell pinches inward, forming a vesicle of solutes suspended in fluids.

d) large vacuoles are formed by the plasma membrane outside the cell for the transport of large molecules inside the cell

Answer 1

Answer is c

Endocytosis- the name suggests that a molecule is being cytosed or engulfed inside. Here, there is no involvement of receptor, proteins, vacuoles etc. It is a very simple process, like we open our mouth to eat food. Here, small intestine's enterocytes open up their arms by pinching itself inside and a cavity is formed. Hence, lipid molecule comes in that cavity and gets endocytosed inside the cell.

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