A single contraction of a muscle fiber is called a(n):

What term refers to the brain increasing the force of a muscle contraction by activating more and more motor units?

Long, branched chains of glucose found in liver and skeletal muscles and used for glucose storage are called:

Anabolic steroids mimic testosterone and increase athletic performance by stimulating testicular atrophy.

Granny Edith enters a planking competition, and even though she is 98 years-old, she is able to stay in a plank for over 20 minutes.  This exercise requires prolonged contraction of her abdominal muscles.  Which of these would NOT be a feature of the fibers in her abdominal muscles that have adapted to this type of sustained exercise?

Unlike skeletal muscle fibers, smooth muscle cells are not controlled by the nervous system.

Which of these anatomical parts of a muscle fiber is the most important for excitability?

Smooth muscle tissue is characterized as:

Which muscle fiber type would be affected most severely by a decrease in blood flow?  Think about what the blood brings to muscle fibers and which muscle fibers are most in need of a constant blood supply during exercise.

A whole skeletal muscle is generally controlled by a single motor neuron.