Exam 35: Structural Support and Movement

Signals from the _____excite motor neurons,resulting in action potentials in muscle fibers.

Birds and fishes overcome gravitational forces primarily through their ________.  

Answer the following questions with reference to the bones listed below. Answers may be used more than once or not at all. -This bone transfers force from the arms to the axial skeleton.

A sheath of connective tissue that encloses each skeletal muscles is known as _____.  

The spinal cord runs through,and is protected by,the __________.

Energized myosin heads bind to actin only when ____ binds to troponin.  

In an earthworm's _________,fluid-filled internal chambers receive coordinated forces of circular and longitudinal muscle contraction to effect movement.  

Skeletal muscle cells are not typical cells because ____.  

Answer the following questions with reference to the bones listed below. Answers may be used more than once or not at all. -A cartilage disk separates units of this bone.

The flight muscles of a fly are attached to its _______________..  

Action potentials traveling down the plasma membrane of a muscle fiber will next reach the _____ after leaving the T tubules.  

Which of the following statements is true about the flight muscles of a fly?