Exercise Science Fundamentals Flashcards
6 cards from real NASM practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Exercise Science Fundamentals flashcards as text
Which energy system provides the majority of ATP during high-intensity exercise lasting 10–30 seconds?
Answer: Glycolytic system
The glycolytic system predominates for high-intensity efforts lasting roughly 10–30 seconds by breaking down glucose for rapid ATP production.
The sliding filament theory describes muscle contraction as a process in which:
Answer: Actin and myosin filaments slide past each other
In the sliding filament theory, actin filaments are pulled toward the center of the sarcomere by myosin cross-bridge cycling, shortening the muscle.
Which type of muscle fiber has the highest oxidative capacity and is most resistant to fatigue?
Answer: Type I
Type I (slow-twitch) fibers have abundant mitochondria and high oxidative capacity, making them highly fatigue-resistant.
What is the primary role of the Golgi tendon organ (GTO)?
Answer: Detect changes in muscle tension and inhibit overcontracting muscles
The GTO monitors tension within the tendon and triggers autogenic inhibition to protect the muscle from excessive force.
Stroke volume is best defined as:
Answer: The volume of blood ejected per heartbeat
Stroke volume is the amount of blood pumped out of the left ventricle with each heartbeat, measured in milliliters.
Which lever class is MOST common in the human body?
Answer: Third-class lever
Third-class levers, where the effort force is applied between the fulcrum and the load, are the most common arrangement in the human musculoskeletal system.