Movable Limb Lab

materials used for lab

The working model I chose for this lab is the upper forearm limb. The forearm limb shown includes the humerus, radius, ulna, and bicep muscle. The bicep muscle works with the humerus bone and radius bone. When the muscle contracts it pulls on the radius and makes the elbow flex. The following photos will illustrate the steps involved in muscle contraction.

I used a 4x4 to represent the humerus and two 2x2's to represent the radius and ulna. The red scarf represents the bicep muscle. Wire was used for the dendrites, axons, sarcomere and actin filaments. The pink string are myosin filaments and head. The brown milk duds are neurotransmitters, the white tic tac's are sodium, and the brown speckled snow caps are potassium.

The sacromere is made much larger to show the myosin and actin filaments.