The junctions between animal cells that allow the free passage of molecules smaller than approximately 1000 daltons are called
A) tight junctions.
B) plasmodesmata.
C) gap junctions.
D) hemidesmosomes.

Question

Quizplus · Accepted Answer

Gap junctions are specialized intercellular connections between animal cells that allow for the unrestricted passage of small molecules and ions directly between the cytoplasm of adjacent cells. These junctions are made up of channels called connexons, which are formed by proteins called connexins. Tight junctions, on the other hand, seal the gap between adjacent animal cells to prevent the leakage of molecules between them, while plasmodesmata are junctions that allow for the movement of substances between plant cells. Hemidesmosomes anchor epithelial cells to the basal lamina.

The Junctions Between Animal Cells That Allow the Free Passage