2020 Lecture - Muscle Quiz 4

Resting muscles a small degree of tension from involuntary activation of motor units. This is called:

• recruitment

• isotonic contraction

• muscle tone

• fused (complete) tetanus

Cameron tried to pick up a stack of books but discovered that it is much heavier than expected. What must occur to increase tension required to pick up these heavy items?

• tetanic spasm

• recruitment of additional motor units

• isotonic eccentric contractions

• plyometric contraction

In which type of contraction do muscle fibers remain the same length as at rest?

• isometric

• isotonic concentric

• isotonic eccentric

• tetany

In response to resistance (strength) training, muscle fibers will gain additional

• mitochondria

• oxidative enzymes

• myoglobin

• myofibrils

Smooth muscle and skeletal muscle both contain:

• striations

• troponin

• myosin and actin filaments

• sarcomeres