Chapter 10: The Muscular System

First-class levers ________. A) Have load at one end of the lever, fulcrum at the other, and effort applied somewhere in the middle B) Are typified by tweezers or forceps C) In the body can operate at a mechanical advantage or mechanical disadvantage, depending on specific location D) Are the type found in the joints forming the ball of the foot as used in raising the body on the toes

If a lever operates at a mechanical disadvantage, it means that the ________. A) load is far from the fulcrum and the effort is applied near the fulcrum B) lever system is useless C) effort is farther than the load from the fulcrum D) load is near the fulcrum and the effort is at the distal end

If L = load, F = fulcrum, and E = effort, what type of lever system is described as LEF? A) first-class lever B) second-class lever C) third-class lever D) fourth-class lever

In a pennate muscle pattern ________. A) muscles appear to be straplike B) there is a narrow origin diverging to a broad insertion C) there is a broad origin and fascicles converge toward a single tendon D) muscles look like a feather

What are the levers that operate at a mechanical advantage called? A) speed levers B) power levers C) functional levers D) dysfunctional levers

A muscle group that works with and assists the action of a prime mover is a(n) ________. A) antagonist B) fixator C) synergist D) protagonist