Young people may try a number of substances, including alcohol, household chemicals (inhalants), prescription and over-the-counter medicines, illegal drugs, and cigarettes. They use alcohol more than any other substance. Marijuana is the illegal drug that young people use most often. Young people use these substances for many of the same reasons that adults doâto relax or feel good. But they may also have other reasons for using substances.
the paramecium uses cilia, which are tiny hair-like structures, for locomotion. on the other hand, amoeba uses pseudopodia, which are extensions of the cell's cytoplasm, to mo â¦ ve.+ 2 others found this useful.hey move with the help of microscopic hair-like structures called cilia, which act like oars to push them through the water. They swim by rotating slowly and changing directions often. If the Paramecium comes upon an obstacle, it stops, swims backwards, and then angles itself forward on a slightly different course.
Cells also contain the bodyâs hereditary material and can make copies of themselves. Cells have many parts, each with a different function. Some of these parts, called organelles, are specialized structures that perform certain tasks within the cell. Human cells contain the following major parts, listed in alphabetical order: Cytoplasm. Within cells, the cytoplasm is made up of a jelly-like fluid (called the cytosol) and other structures that surround the nucleus. Cytoskeleton. The cytoskeleton is a network of long fibers that make up the cellâs structural framework. The cytoskeleton has several critical functions, including determining cell shape, participating in cell division, and allowing cells to move. It also provides a track-like system that directs the movement of organelles and other substances within cells. Endoplasmic reticulum (ER) This organelle helps process molecules created by the cell. The endoplasmic reticulum also transports these molecules to their specific destinations either inside or outside the cell. The Golgi apparatus packages molecules processed by the endoplasmic reticulum to be transported out of the cell.