Exercise Science & Physiology Flashcards
7 cards from real CFP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Exercise Science & Physiology flashcards as text
Which energy system is the PRIMARY source of ATP during a maximal-effort sprint lasting 6–10 seconds?
Answer: Phosphocreatine (ATP-PCr) system
The ATP-PCr system provides immediate, high-power energy for very short maximal efforts of 6–10 seconds without requiring oxygen.
During aerobic exercise, which organelle is primarily responsible for ATP production via oxidative phosphorylation?
Answer: Mitochondria
Mitochondria contain the electron transport chain and ATP synthase, making them the site of aerobic ATP production.
A client's heart rate fails to increase appropriately during progressively harder exercise. This condition is called:
Answer: Chronotropic incompetence
Chronotropic incompetence is the inability of the heart to increase rate appropriately in response to increased exercise demand.
Which muscle fiber type has the HIGHEST oxidative capacity and is most resistant to fatigue?
Answer: Type I (slow-twitch)
Type I (slow-twitch) fibers have abundant mitochondria and myoglobin, giving them high oxidative capacity and excellent fatigue resistance.
The Fick equation defines VO₂ as the product of cardiac output and which other variable?
Answer: Arteriovenous oxygen difference (a-vO₂ diff)
The Fick equation states VO₂ = Cardiac Output × (a-vO₂ difference), reflecting how much oxygen is extracted by working tissues.
What happens to stroke volume during moderate-intensity aerobic exercise in a trained individual?
Answer: It increases due to enhanced ventricular filling and contractility
Trained individuals show increased stroke volume during moderate exercise due to greater venous return, ventricular preload, and myocardial contractility.
Which respiratory response occurs when exercise intensity exceeds the lactate threshold?
Answer: Ventilation increases disproportionately (ventilatory threshold)
Above the lactate threshold, excess CO₂ from bicarbonate buffering of lactic acid drives a disproportionate rise in ventilation called the ventilatory threshold.