Which component of a syringe is primarily responsible for drawing and expelling the solution?

The component of a syringe that is primarily responsible for drawing and expelling the solution is the plunger. The plunger is the part that is pushed or pulled within the barrel of the syringe. When the plunger is pulled back, it creates a vacuum that draws the liquid into the barrel. Conversely, when the plunger is pushed down, it expels the solution out through the tip of the syringe.

The barrel serves as the chamber where the liquid is held and provides a graduated scale that allows for accurate measurement of the volume of the liquid being drawn or expelled. The tip is the part of the syringe where the needle attaches and does not influence the action of drawing or expelling the liquid directly. The plunger tip is a small part of the plunger that interacts with the solution but does not contribute to the overall mechanical action of drawing and expelling the fluid. Thus, the primary role of moving the solution in and out of the syringe lies with the plunger itself.