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 hormone is most responsible for mobilizing free fatty acids from adipose tissue during prolonged low-intensity exercise?
Answer: Epinephrine
Epinephrine (adrenaline) activates hormone-sensitive lipase in adipocytes, releasing free fatty acids for use as fuel during prolonged aerobic exercise.
The sliding filament theory of muscle contraction states that:
Answer: Actin slides over myosin, shortening the sarcomere without filaments changing length
During contraction, myosin heads pull actin filaments toward the center of the sarcomere, shortening it without the filaments themselves changing length.
A client performs 3 sets of 12 reps at 70% 1RM. This protocol primarily targets which training adaptation?
Answer: Muscular hypertrophy
Moderate loads (67–85% 1RM) with moderate rep ranges (8–12) and multiple sets are the classic stimulus for skeletal muscle hypertrophy.
What is the PRIMARY role of calcium (Ca²⁺) in skeletal muscle contraction?
Answer: Binds troponin to expose actin binding sites for myosin
Released from the sarcoplasmic reticulum, Ca²⁺ binds to troponin C, causing tropomyosin to shift and expose actin's myosin-binding sites.
Which physiological variable is MOST closely correlated with endurance performance in well-trained athletes?
Answer: Lactate threshold as a % of VO₂max
Among athletes with similar VO₂max values, the lactate threshold as a percentage of VO₂max best discriminates endurance performance.
The 'all-or-none' principle of muscle contraction refers to:
Answer: An individual motor unit firing maximally or not at all when threshold is reached
When a motor neuron reaches action potential threshold, all muscle fibers in that motor unit contract maximally; they cannot produce a partial response.
Which adaptation is MOST associated with long-term aerobic endurance training?
Answer: Increased mitochondrial density in skeletal muscle
Chronic aerobic training significantly increases the number and size of mitochondria in trained muscle fibers, enhancing oxidative capacity.