ExamEdge: Exercise Physiology

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Challenge your knowledge of exercise physiology

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Antonio Garcia

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ExamEdge: Exercise Physiology


Froggy Jumps ExamEdge: Exercise PhysiologyOnline version Challenge your knowledge of exercise physiology by Antonio Garcia 1 Which muscle fiber type has the highest mitochondria density and endurance capacity? a Type IIa (fast oxidative) b Type I (slow-twitch) c Type IIx (fast-twitch) 2 What primarily drives short-term strength gains in the first weeks of resistance training? a Neural adaptations b Muscle hypertrophy c Increased mitochondria density 3 Which energy system predominates in a 30-second sprint? a Gluconeogenesis b Oxidative phosphorylation c Anaerobic alactic and lactic systems (phosphagen and glycolysis) 4 What cellular pathway is central to resistance-training-induced muscle protein synthesis? a Citrate cycle (TCA) b AMPK pathway c mTOR signaling 5 What is the term for loss of muscle mass with aging? a Sarcopenia b Hyperplasia c Myositis 6 Which molecule acts as a key trigger for muscle protein synthesis after resistance exercise? a Insulin alone b mTOR activation via mechanoreceptors c AMPK activation 7 Which factor best explains initial strength gains in novices? a Increased cross-sectional area within days b Muscle fiber hyperplasia c Increased motor unit recruitment 8 What is DOMS most closely associated with after unaccustomed eccentric exercise? a Electrolyte imbalance b Dehydration c Muscle damage and inflammation 9 Which fiber type experiences the greatest hypertrophy with resistance training? a Type IIa b Type I c Type II (especially IIx) 10 What describes the speed of contraction as it relates to fiber type? a All fibers contract at the same speed b Fast fibers contract more quickly c Slow fibers contract faster with training 11 Which neuromuscular adaptation helps explain early strength gains? a Hyperplasia of fibers b Increased neural drive and motor unit recruitment c Satellite cell proliferation 12 During endurance exercise, which substrate becomes most depleted over prolonged periods (>2 hours)? a Fat stores only b Creatine phosphate c Glycogen in muscles and liver 13 What is the primary function of the Golgi tendon organ during heavy lifting? a Stimulates muscle fiber growth b Inhibits excessive force to protect the muscle c Initiates muscle contraction 14 What happens to satellite cells during resistance training? a Donor nuclei added to fibers aiding growth b They die off early c They become mitochondria 15 Which adaptation largely explains increased fiber-specific force after training? a Calcium sensitivity and cross-bridge formation b Mitochondrial biogenesis only c Decreased fiber size 16 What is the typical pattern of motor unit recruitment? a Random recruitment b Large to small c Small to large (Henneman’s size principle) 17 What is the main energy source for high-intensity, short-duration activities (0-10 s)? a Phosphocreatine (PCr) system b Fat oxidation c Glycogen only 18 In aging, which fiber type tends to atrophy more with sarcopenia? a Type I fibers b Both equally c Type II fibers 19 What is the primary outcome of overreaching and overload in training? a Permanent strength loss b No change in performance c Performance gains followed by possible fatigue 20 Which protein synthesis phase follows mechanical stretch in resistance training? a Calpain degradation b Glycolytic upregulation c mTOR-mediated translation 21 Which factor most influences the rate of detraining after resistance training? a Diet alone b Age only c Frequency and duration of stopping training 22 What occurs first during excitation-contraction coupling? a Cross-bridge cycling begins b Calcium release from SR c Depolarization of the motor end plate 23 What best describes force versus power in muscle performance? a Power = force × velocity of shortening b Power = cross-sectional area × velocity c Power is independent of velocity 24 Which muscle type shows the highest baseline ATPase activity? a Type IIa fibers equally b Fast-twitch Type II fibers c Slow-twitch Type I fibers 25 What is a key concept of training specificity? a All training improves all systems equally b Adaptations depend on fiber recruited, energy system, and velocity c Only genetics matter 26 Which condition is most associated with exercise-induced muscle cramps? a Dehydration alone b Electrolyte imbalance only c Hyperactive spinal motor neurons 27 What term describes the loss of muscle mass due to inactivity? a Detraining b Hyperplasia c Overtraining 28 What is the predominant energy system during a 400 m sprint? a Fat oxidation only b Anaerobic glycolysis with phosphagen contribution c Aerobic oxidation 29 Which statement best describes hypertrophy vs. hyperplasia in humans? a Hyperplasia is the main source b Both contribute equally in humans c Hypertrophy is the main source of mass increase 30 What happens to cross-bridge cycling during fatigue at high intensity? a Cross-bridge cycling rate declines b Cross-bridges increase indefinitely c Calcium reuptake stops completely 31 Which adaptation is most linked to improved sprint performance after training? a Increased capillary density only b Increased neural drive and motor unit recruitment c Hyperplasia of fibers 32 Which hormone pathway is most linked to muscle growth after resistance exercise? a Cortisol drive b Insulin-like growth factor solely c mTOR pathway activation 33 What is the effect of NSAIDs on resistance training hypertrophy in humans? a Significant impairment of hypertrophy b Complete inhibition of protein synthesis c Little to no negative impact on strength gains 34 What is a key difference between Type IIx and Type IIa fibers? a IIx is slower contracting than IIa b IIa is pure anaerobic; IIx is aerobic c IIx is more glycolytic; IIa is more oxidative 35 What is a hallmark of aerobic training adaptation in muscle? a Hyperplasia is primary b Increased myonuclei without size change c Increased mitochondrial density and oxidative enzymes 36 Which factor most influences recovery between repeated sprints? a Rest interval allowing phosphagen replenishment b Total daily calories only c Hydration alone 37 What is the relationship between inflammation and DOMS? a DOMS is unrelated to inflammation b Inflammation always harms performance c Inflammation contributes to soreness 38 Which fiber type shows the greatest reduction in Vmax with aging? a All fibers equally b Type II fibers c Type I fibers 39 Which process increases muscle protein synthesis after exercise? a Fatty acid oxidation b Transcription and translation via mTOR c Glycolysis only 40 What is the most accurate description of motor unit recruitment? a Smaller units first, larger units recruited with higher demand b Larger units first then smaller c Random order every time 41 What primarily limits force production in a muscle fiber? a Oxygen tension only b Mitochondrial number alone c Cross-bridge formation and calcium availability 42 Which adaptation contributes to improved fatigue resistance in endurance training? a Increased oxidative capacity and capillary density b Hyperplasia drive c Increased myonuclei only 43 Which factor best explains faster gains in trained individuals? a Neuromuscular adaptations and efficiency b Only neural factors with no hypertrophy c Only hypertrophy 44 What happens to ATP demand during a high-intensity effort? a ATP demand increases dramatically for short duration b ATP demand remains constant c Only glycolysis supplies ATP 45 Which is a characteristic of Type I fibers? a High capillary density and oxidative capacity b Very high glycolytic activity c Low mitochondria 46 What is the primary effect of training on the nervous system in early phases? a Hyperplasia b Increased neural drive and synchronization c Increased fat mass 47 Which factor is least involved in DOMS development? a Muscle fiber microtrauma b Eccentric loading c Immediate caloric intake prior to exercise 48 What is the concept of reversibility in training? a Gains only occur with overtraining b Gains are lost when overload is removed c Gains are permanent 49 What type of contraction characterizes plyometric exercise? a Stretch-shortening contractions b Concentric only c Isometric contraction 50 Which electrolyte imbalance is most linked to cramps? a Hyperkalemia as sole cause b Hypernatremia c Not the sole cause; neural excitability plays a role 51 Which adaptation most directly increases force production in Type I fibers after training? a Increased calcium sensitivity b Increased sarcomere number only c Decreased mitochondria 52 What is the role of satellite cells in hypertrophy? a Increase energy supply b Replace damaged fibers c Provide new nuclei to support growth 53 Which training principle states adaptations are specific to the task? a Overload b Specificity c Reversibility 54 Which factor most affects the thickness of a muscle fiber after training? a Bone density b Water content only c Myofibrillar protein accretion (actin/myosin) 55 What is a common early sign of neural adaptations to resistance training? a Hyperplasia b Improved motor unit synchronization c Increased fat mass 56 Which system dominates energy during a 2-minute high-intensity bout? a Fat oxidation dominating b Anaerobic glycolysis with some aerobic contribution c Phosphagen only 57 Which muscle action type decreases muscle length? a Concentric contraction b Isometric c Eccentric contraction 58 What is a key difference between hypertrophy and hyperplasia in humans? a Hyperplasia is main source b Both equally contribute c Hypertrophy is main source of mass increase 59 Which factor most strongly influences endurance performance adaptations? a Bone density b Muscle fiber count only c Muscle oxidative capacity and capillarization 60 Which statement best describes the role of acetylcholine at the NMJ? a It degrades calcium b It inhibits contraction c It triggers depolarization of the muscle fibre 61 What happens to cross-bridge cycling during high fatigue? a Slower cycling and reduced force b No change c Faster cycling 62 Which training outcome is most associated with increased lean mass? a Endurance cycling only b Resistance training with adequate protein c Low-calorie diet alone 63 Which factor contributes to the muscle memory concept? a Retention of myonuclei after detraining b Complete muscle atrophy reversibility c Permanent fiber splitting 64 What is the primary energy source for low-intensity, long-duration activity? a Glycolysis b Phosphocreatine c Fat oxidation 65 Which component helps restore membrane potential after an action potential? a Sodium channels b Calcium pumps c Na+/K+ ATPase pump 66 Which training aspect is emphasized by the principle of reversibility? a Gains increase without training b Gains fade when overload is removed c Gains are permanent 67 Which muscle receptor provides information on muscle length and rate of shortening? a Golgi tendon organ b Joint capsule receptors c Muscle spindle 68 Which statement is true about Type IIx fibers? a Primarily oxidative b High glycolytic capacity and rapid fatigue c Slow contraction speed 69 What is a typical duration to see initial hypertrophy from training? a Several weeks to months b Minutes c Hours 70 Which factor most strongly affects motor unit recruitment at a given force? a Bone density b Muscle cross-section alone c Neural drive and firing rate 71 Which adaptation is most linked to improved sprint mechanics after training? a Hyperplasia b Optimized neural recruitment and rate coding c Increased tendon stiffness only 72 What is the term for the decline in muscle power output with fatigue? a Neuromuscular fatigue only b Deltoid fatigue c Muscle fatigue 73 Which statement best describes energy system overlap during events? a Only one system is used b Multiple systems contribute depending on duration and intensity c All systems are equally active always 74 What happens to ATP turnover during intense exercise? a No need for PCr b Rapid ATP turnover with rapid depletion of PCr c Slow turnover 75 Which factor is least associated with DOMS severity? a Immediate post-exercise hydration status b Muscle fiber microtrauma c Eccentric work 76 Which training principle supports periodization for adaptations? a Only high volume b Constant training stimulus c Specificity with progressive overload 77 What drives calcium release in the SR during contraction? a Excitation-contraction coupling signal b ATP depletion c Lactic acid build-up 78 Which factor most strongly affects the rate of neural adaptations to resistance training? a Diet alone b Age alone c Training frequency and intensity 79 Which fibers show the greatest cross-sectional area increase with training? a Both equal b Type I fibers c Type II fibers 80 What is the primary role of the sarcoplasmic reticulum in contraction? a Calcium storage and release b ATP production c Myosin synthesis 81 Which term describes the force produced per unit area of muscle? a Specific tension b Cross-sectional force c Total tension 82 Which adaptation is most associated with increased fatigue resistance? a Increased ATPase alone b Fiber splitting c Increased mitochondrial density 83 What is the primary effect of eccentric loading on muscle? a Greater muscle damage but favorable strength gains b Less damage and poor gains c No effect on fibers 84 Which mechanism explains why trained athletes may recover strength quickly after detraining? a Hypertrophy only persists b Permanent neural changes c Retraining rapidly reactivates neural adaptations 85 Which training variable is most important for strength gains in novices? a Maximum speed work b Adequate overload with progressive resistance c High volume only 86 What is the role of myonuclei in trained fibers? a Destroy old nuclei b Decrease gene expression c Support increased protein synthesis 87 Which statement best describes antagonistic muscle participation during contraction? a Antagonists always inactive b Reduced antagonistic activity can enhance net force c Antagonists always active equally 88 Which statement about energy substrates during exercise is true? a Substrate use shifts with intensity and duration b Fat is used exclusively c Only glucose is used 89 What describes a characteristic of Type IIa fibers? a Purely glycolytic b Purely oxidative c Combo of oxidative and glycolytic capacity 90 What is the purpose of periodization in a training plan? a To confuse the athlete b To reduce training load to zero c To optimize performance peaks and recovery

ExamEdge: Exercise Physiology

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ExamEdge: Exercise PhysiologyOnline version

by Antonio Garcia

Which muscle fiber type has the highest mitochondria density and endurance capacity?

What primarily drives short-term strength gains in the first weeks of resistance training?

Which energy system predominates in a 30-second sprint?

What cellular pathway is central to resistance-training-induced muscle protein synthesis?

What is the term for loss of muscle mass with aging?

Which molecule acts as a key trigger for muscle protein synthesis after resistance exercise?

Which factor best explains initial strength gains in novices?

What is DOMS most closely associated with after unaccustomed eccentric exercise?

Which fiber type experiences the greatest hypertrophy with resistance training?

What describes the speed of contraction as it relates to fiber type?

Which neuromuscular adaptation helps explain early strength gains?

During endurance exercise, which substrate becomes most depleted over prolonged periods (>2 hours)?

What is the primary function of the Golgi tendon organ during heavy lifting?

What happens to satellite cells during resistance training?

Which adaptation largely explains increased fiber-specific force after training?

What is the typical pattern of motor unit recruitment?

What is the main energy source for high-intensity, short-duration activities (0-10 s)?

In aging, which fiber type tends to atrophy more with sarcopenia?

What is the primary outcome of overreaching and overload in training?

Which protein synthesis phase follows mechanical stretch in resistance training?

Which factor most influences the rate of detraining after resistance training?

What occurs first during excitation-contraction coupling?

What best describes force versus power in muscle performance?

Which muscle type shows the highest baseline ATPase activity?

What is a key concept of training specificity?

Which condition is most associated with exercise-induced muscle cramps?

What term describes the loss of muscle mass due to inactivity?

What is the predominant energy system during a 400 m sprint?

Which statement best describes hypertrophy vs. hyperplasia in humans?

What happens to cross-bridge cycling during fatigue at high intensity?

Which adaptation is most linked to improved sprint performance after training?

Which hormone pathway is most linked to muscle growth after resistance exercise?

What is the effect of NSAIDs on resistance training hypertrophy in humans?

What is a key difference between Type IIx and Type IIa fibers?

What is a hallmark of aerobic training adaptation in muscle?

Which factor most influences recovery between repeated sprints?

What is the relationship between inflammation and DOMS?

Which fiber type shows the greatest reduction in Vmax with aging?

Which process increases muscle protein synthesis after exercise?

What is the most accurate description of motor unit recruitment?

What primarily limits force production in a muscle fiber?

Which adaptation contributes to improved fatigue resistance in endurance training?

Which factor best explains faster gains in trained individuals?

What happens to ATP demand during a high-intensity effort?

Which is a characteristic of Type I fibers?

What is the primary effect of training on the nervous system in early phases?

Which factor is least involved in DOMS development?

What is the concept of reversibility in training?

What type of contraction characterizes plyometric exercise?

Which electrolyte imbalance is most linked to cramps?

Which adaptation most directly increases force production in Type I fibers after training?

What is the role of satellite cells in hypertrophy?

Which training principle states adaptations are specific to the task?

Which factor most affects the thickness of a muscle fiber after training?

What is a common early sign of neural adaptations to resistance training?

Which system dominates energy during a 2-minute high-intensity bout?

Which muscle action type decreases muscle length?

What is a key difference between hypertrophy and hyperplasia in humans?

Which factor most strongly influences endurance performance adaptations?

Which statement best describes the role of acetylcholine at the NMJ?

What happens to cross-bridge cycling during high fatigue?