Ch. 10 Muscle Performance – Flashcards

The soleus muscle is very red in color. Which of these statements about soleus muscle fibers is FALSE? They have a slow twitch speed. They are slow to fatigue. They are rich in myoglobin. They are large in diameter.

The __________ type of muscle fiber has relatively few mitochondria.

Increased muscle fiber endurance can be affected by __________.

How is delayed-onset muscle soreness (DOMS) different from muscle fatigue?

Activities involving eccentric contractions more commonly lead to delayed-onset muscle soreness than concentric or isometric contractions. Which of the following activities is thus a candidate for delayed-onset muscle soreness?

Muscle fatigue occurs because of a buildup of __________ and a(n) __________ in pH.

The biochemical reaction that consumes the majority of a muscle's ATP is the __________.

Fatigued muscles signify __________.

What is the type of chemical reaction used to rebuild ADP into ATP?

Which of the following processes produces molecules of ATP and has two pyruvic acid molecules as end products? hydrolysis of creatine phosphate Krebs cycle and oxidative phosphorylation glycolysis

Which of the following processes produces 36 ATP? hydrolysis of creatine phosphate glycolysis Krebs cycle and oxidative phosphorylation

The "rest and recovery" period, where the muscle restores depleted reserves, includes all of the following processes EXCEPT __________. Glycogen is synthesized from glucose molecules. Pyruvic acid is converted back to lactic acid. ATP is used to rephosphorylate creatine into creatine phosphate. Oxygen rebinds to myoglobin.

Which type of muscle fiber has a large quantity of glycogen and mainly uses glycolysis to synthesize ATP?

Four Different Types of Effects of Repeated Stimulation

What causes the release of calcium from the terminal cisternae of the sarcoplasmic reticulum within a muscle cell?

The binding of calcium to which molecule causes the myosin binding sites to be exposed?

What causes the myosin head to disconnect from actin?

What causes the power stroke?

Bacteria that cause tetanus release a neurotoxin called tetanospasmin. Which of the following components of the neuromuscular junction (NMJ) does this neurotoxin affect directly?

Why do the disease tetanus and the normal sustained muscle contraction called tetanus share the same name?

Which of the following is important to increasing efficiency in tension production?

A single muscle stimulus will normally be followed by __________.

A muscle producing its maximum tension for a prolonged period is in __________.

What can the nervous system do to increase muscle tension? increase the number of active motor units increase stimulation frequency recruit larger motor units All of the listed responses can increase muscle tension.