Exam 6: The Muscular System

Plantar flexion at the ankle joint is accomplished by the tibialis anterior muscle.

Thick filaments are made of a protein called actin.

Which muscle group includes the biceps femoris, semimembranosus, and semitendinosus?

Striated involuntary muscle tissue is classified as ________ muscle.

Explain how isometric and isotonic contractions differ, using examples of each.

Match the following: -Primary action of the erector spinae

Muscle tissue has the ability to shorten when adequately stimulated, a characteristic known as ________.

Abduction and adduction are antagonistic actions.

Neurotransmitters are released upon stimulation from a nerve impulse by the ________.

When a skeletal muscle is fully contracted, the ________ are closer to the thick filaments.

What types of movements are demonstrated by your arms and legs when you perform jumping jacks in physical education class? Describe these movements.

The plasma membrane of a skeletal muscle cell is called the ________.

Match the following: -The movement of a limb away from the body midline

Striated involuntary muscle tissue found in the heart is ________.

Why are calcium ions necessary for skeletal muscle contraction?

Paralysis of which of the following would make an individual unable to flex the hip ________.

Discuss the importance of calcium in skeletal muscle contraction.

Anaerobic glycolysis occurs without ________.

Using Figure 6.2, match the following: -The perimysium wraps a fascicle of muscle cells and is represented by ________.

When a muscle fiber contracts, the I bands diminish in size, the H zones disappear, and the A bands move closer together but do not diminish in length.