Exercise Physiology and Anatomy Flashcards
6 cards from real PTC 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 Physiology and Anatomy flashcards as text
Which muscle is primarily responsible for knee extension?
Answer: Quadriceps
The quadriceps femoris group, located on the anterior thigh, is the primary muscle responsible for extending the knee joint.
What is the term for the period when the heart ventricles are contracting and pumping blood?
Answer: Systole
Systole refers to the phase of the cardiac cycle when the ventricles contract and eject blood into the arteries.
Which energy system provides the majority of ATP during a 400-meter sprint?
Answer: Glycolytic system
The glycolytic (anaerobic glycolysis) system predominates during moderate-to-high intensity activities lasting 30 seconds to 2 minutes, such as a 400-meter sprint.
What is VO2 max?
Answer: Maximum volume of oxygen the body can use per minute
VO2 max is the maximum rate at which an individual can consume oxygen during intense exercise, expressed in mL/kg/min, and is the gold standard measure of aerobic capacity.
Which type of muscle fiber is best suited for endurance activities?
Answer: Type I slow-twitch
Type I (slow-twitch) muscle fibers have high mitochondrial density and aerobic capacity, making them highly resistant to fatigue and ideal for sustained endurance activities.
What happens to stroke volume during aerobic exercise at moderate intensity?
Answer: It increases
Stroke volume increases during moderate aerobic exercise due to greater venous return, increased myocardial contractility, and the Frank-Starling mechanism.