During activities requiring aerobic endurance
a) oxygen debts are common.
b) oxygen is not required.
c) most of the muscle's energy is produced in mitochondria.
d) fatigue occurs in a few minutes.
e) glycogen and glycolysis are the primary sources of reserve energy.
Answer: C
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Muscle
- During the recovery period the body's need for oxygen is increased because
- Which of the following is not a type of motor unit?
- Each skeletal muscle fiber is controlled by a motor neuron at a single
- How would the loss of acetylcholinesterase from the motor end plate affect skeletal muscle?
- Compared to a "typical" body cell, skeletal muscle cells are
- The region of the sarcomere that always contains thin filaments is the
- Creatine phosphate
- The type of contraction in which the muscle fibers do not shorten is called
- Fast fibers
- During anaerobic glycolysis
- During the recovery period following exercise, all of the following are true, except
- Calcium ions are binding to troponin during the ________ of a muscle twitch.
- Fast muscle fibers can adapt to aerobic metabolism by generating more mitochondria in response to
- Cross-bridges are portions of
- How would a drug that blocks acetylcholine receptors at the motor end plate affect skeletal muscle?
- Receptors for acetylcholine are located on the
- When calcium ion binds to troponin,
- In a sarcomere, thick filaments are linked laterally by proteins of the
- The thin filaments of striated muscle are made of which protein(s)?
- Which of the following statements is false?
- The narrow space between the synaptic terminal and the muscle fiber is the
- Which of the following best describes the term Z line?
- At peak levels of muscle exertion the mitochondria can supply
- When a muscle is stimulated repeatedly at a high rate, the amount of tension gradually increases to a steady maximum tension. This is called