A vesicle can be thought of like a tiny pouch that surrounds the molecule and ushers it through an opening in the cell membrane. Examples of Selectively Permeable Membranes Selectively permeable membranes can be found around a variety of cells and places.
Weft Knitting Manufacture. Weft knitting is a knitted piece of fabric where the stitches run from left to right horizontally across the fabric. It is usually knitted with one piece of yarn, and can be made either by hand or using a knitting machine.
The number of needle beds, sets of needles, and the configuration of the needle and needle beds are the main differences among the machines used to produce the different types of weft knits. Single weft knits according to this classification include fabrics knitted on knitting machines with a single needle bed.