Common pairs of antagonist and agonist muscles exist. In the upper body, the biceps and triceps work to complete actions related to movement of the arm. The quadriceps and hamstrings in the upper leg work to help move the knee joint and perform exercises, such as squats and leg extensions.
Definition of lattice for Students. 1  1 : a structure made of thin strips of wood or metal that cross each other. 2  2 : a window or gate having a lattice.
The molecules in a solid are fixed in a three dimensional pattern called a lattice or matrix. When heat is applied the molecules start to vibrate and eventually the lattice breaks down and loses its shape under the forces of gravity..