Exam 8: Muscular System

Like skeletal muscles,cardiac muscles have intercalated disks.

During strenuous exercise,the muscles' use of oxygen and nutrients can outstrip the blood's ability to supply them.

When a muscle contraction occurs

The origin of a muscle is on the more stationary bone.

Skeletal muscles contain a substance called myoglobin that helps store oxygen.

Raising your arm laterally away from your body is an example of adduction.

What part of the body does the pectoralis major move?

What part of the body does the deltoid move?

The pull of gravity assists the muscles in maintaining body posture.

Each shaftlike actin fiber has a "head" that sticks out toward the myosin fiber.

Moving a part of the body away from the midline of the body is called

Match the muscles that move the lower extremity with their function. -Flexes knee

Match the muscles that move the lower extremity with their function. -Flexes thigh and rotates lower leg

Groups of muscle fibers are called

Bursae and tendon sheaths have the same function.

The thin myofilament in a muscle fiber is made of actin.

Match the muscles that move the upper extremities and the muscles of the trunk with their function. -Extends elbow

Match the muscles that move the lower extremity with their function. -Extends knee

Endurance training causes muscle hypertrophy.

What part of the body does the zygomaticus move?