Exam 6: The Muscular System

What is the main function of the quadriceps group?

Discuss the role of the myosin heads in sliding filament theory.

Aerobic, or endurance, exercise involves jogging or biking.

A skeletal muscle twitch differs from a tetanic contraction in that ________.

Which muscle helps compress the abdominal contents during defecation or childbirth?

Which of these events must occur first to trigger the skeletal muscle to generate an action potential and contract?

A nursing infant develops a powerful sucking muscle that adults also use for whistling or blowing a trumpet called the ________.

Using Figure 6.2, match the following: -The muscle fiber (cell) is indicated by ________.

Match the following: -Type of movement that decreases the angle of the joint

During skeletal muscle contraction, to what do myosin heads bind?

The neurotransmitter used by the nervous system to activate skeletal muscle cells is acetylcholine.

Match the following: -Primary action of the rectus abdominis

The formation of cross bridges requires both calcium ions and ATP.

The sarcoplasmic reticulum wraps like a sleeve around the myofibril and stores and releases calcium.

An inherited disease that causes muscles to degenerate and atrophy is known as ________.

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

Describe the events that occur from the time that a motor neuron releases acetylcholine at the neuromuscular junction until muscle cell contraction occurs.

Anaerobic glycolysis requires ________ to make ATP.

Which method of regenerating ATP during muscle contraction can produce lactic acid?

Match the following: -Muscle tissue composed of branching cells and intercalated discs