A&P Ch 6 The Muscular System

ALS (amyotrophic lateral sclerosis) is a disease that destroys nerve cells that control skeletal muscle activity. Without neural stimulation, skeletal muscles eventually waste away and mobility is impossible. In other words, skeletal muscles __________.

Which of these characteristics applies only to cardiac muscle tissue?

Which of these increases as muscles age?

What can older individuals do to increase muscle strength?

What mineral is released within muscle cells to trigger contraction?

What term refers to a smooth, sustained contraction?

Which of these muscles is located in the neck?

Which of these muscles extends the knee?

Which connective tissue bundles muscle fibers into fascicles?

Which of these muscles is named for the arrangement of its fascicles?

What is the function of creatine phosphate?

There are three types of muscle tissue. Which of the following is classified as part of the muscular system?

What term describes the rotation of a bone around its longitudinal axis?

What term refers to a muscle that aids another muscle by producing the same the movement or reducing undesirable movements?

What metabolic waste accumulates in muscle with excessive exertion?

What initiates an action potential on a muscle cell?

Which neurotransmitter is released by motor neurons at the neuromuscular junction?

A muscle inserts on which of the following?

Which of these muscles moves the upper limb?

What happens to a muscle when the nerve supplying that muscle is cut?

Which movement is associated with the hand but actually occurs in the forearm?

he cross bridge cycle is a series of molecular events that occur after excitation of the sarcolemma. What is a cross bridge?

What structure is the functional unit of contraction in a skeletal muscle fiber?

Calcium ions couple excitation of a skeletal muscle fiber to contraction of the fiber. Where are calcium ions stored within the fiber?

When does cross bridge cycling end?