Question

Which of the following statements are TRUE?

Skeletal Muscle is the ONLY type of muscle under your conscious control.
A typical human (110 - 165 lbs.) will "burn" their body weight in ATP every day.
Sarcomeres are the "functional unit" of striated muscle.
When ALL of the motor units in a skeletal muscle are stimulated, the muscle is said to be exhibiting "maximal" contraction strength.
A typical skeletal muscle can operate maximally in an anaerobic state for up to 10 minutes before it goes into "oxygen debt" and shuts down.
We all have roughly the same number of muscle cells. Varying degrees of strength between individuals that can be seen are due to the number of myofibrils in each cell.
a) 1, 2, 3, 4, 5, 6
b) 2, 4, 6
c) 1, 3, 5
d) 4, 6

Answer 1

The statements that are true include skeletal muscle being under conscious control, sarcomeres as the functional unit of striated muscle, and the concept of maximal contraction when all motor units are activated. Other claims about ATP usage and anaerobic operation timeframes are exaggerated or incorrect.

Step-by-step explanation:

The correct statements concerning skeletal muscle and muscle physiology are that skeletal muscle is the only type of muscle under your conscious control, sarcomeres are the "functional unit" of striated muscle, and when all of the motor units in a skeletal muscle are stimulated, the muscle is said to be exhibiting "maximal" contraction strength. Skeletal muscles are composed of sarcomeres, which are the basic functional units that shorten during muscle contraction. Each skeletal muscle fiber consists of a bundle of myofibrils, which are themselves bundles of protein filaments arranged in repeating units called sarcomeres, giving the skeletal muscle its striated appearance. While a typical human does use a significant amount of ATP each day, the statement about 'burning' one's body weight in ATP every day is exaggerated. Moreover, skeletal muscles can operate in an anaerobic state for shorter timeframe than the specified 'up to 10 minutes.' The number of muscle cells in an individual is relatively constant but the strength differences come from factors including the number of and size of myofibrils, as well as the proportion of fiber types (fast vs. slow-twitch).