Year 13 CIE Physical Education: Unit Test Mock Paper Walkthrough | 单元测试模拟卷解析

📚 Year 13 CIE Physical Education: Unit Test Mock Paper Walkthrough | 单元测试模拟卷解析

Welcome to this detailed walkthrough of a Year 13 CIE Physical Education unit test mock paper, designed to help you master key concepts in exercise physiology, energy systems, and training principles. This analysis will break down each question, providing model answers, examiner insights, and common pitfalls to avoid. Whether you are revising for your final A-Level exams or consolidating your understanding of the A2 syllabus, this resource will sharpen your exam technique and deepen your knowledge.

欢迎阅读这份 Year 13 CIE 体育单元测试模拟卷的详细解析，旨在帮助你掌握运动生理学、能量系统和训练原则的核心概念。本解析将逐题分解，提供示范答案、考官见解以及需要避免的常见错误。不论你是在为 A-Level 最终考试复习，还是巩固对 A2 课程的理解，这份材料都将提升你的考试技巧并加深你的知识。

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1. Mock Paper Structure and Key Exam Strategies | 模拟卷结构与关键应试策略

The mock paper consists of three sections: multiple-choice questions testing factual recall, short-answer questions assessing application and analysis, and an extended response question demanding synthesis and evaluation. Before diving into answers, it is crucial to allocate time wisely: spend 1 minute per mark, underline command words such as ‘explain’, ‘evaluate’, and ‘justify’, and always link physiological mechanisms to performance outcomes. Use technical vocabulary like ‘mitochondrial density’, ‘lactate threshold’, and ‘ATP resynthesis’ precisely, as examiners award marks for accurate terminology.

模拟卷由三部分组成：选择题测试知识记忆，简答题评估应用与分析，以及拓展回答题要求综合与评价。在深入答案之前，明智地分配时间至关重要：每分钟对应1分，划出指令词如“解释”、“评价”和“论证”，并始终将生理机制与运动表现结果联系起来。准确使用诸如“线粒体密度”、“乳酸阈”和“ATP再合成”等专业术语，因为考官会给准确的术语打分。

Structure longer answers with a clear introduction, main body paragraphs using PEEL (Point, Evidence, Explanation, Link), and a concise conclusion. Avoid vague statements; instead, provide concrete examples, such as referencing a specific athlete or sport. For data-analysis questions, always quote figures from graphs or tables and explain trends using physiological reasoning.

用清晰的引言、使用 PEEL（观点、证据、解释、联系）的主体段落以及简洁的结论来构建较长的答案。避免模糊的陈述；相反，要提供具体的例子，比如提及特定的运动员或运动项目。对于数据分析题，务必引用图表或表格中的数字，并用生理学原理解释趋势。

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2. Question 1: ATP-PC System and Enzyme Action | 问题1：ATP-PC 系统与酶作用

Question: Which enzyme catalyses the breakdown of phosphocreatine (PC) to resynthesise ATP during the first few seconds of maximal exercise? A. ATPase B. Creatine kinase C. Phosphofructokinase D. Lactate dehydrogenase

问题：在极限运动的最初几秒，哪种酶催化磷酸肌酸 (PC) 的分解以再合成 ATP？A. ATP酶 B. 肌酸激酶 C. 磷酸果糖激酶 D. 乳酸脱氢酶

The correct answer is B, creatine kinase. This enzyme facilitates the rapid transfer of a phosphate group from PC to ADP, forming ATP. The reaction is: PC + ADP → ATP + Creatine. This system provides immediate energy for activities lasting up to 10 seconds, such as a 100m sprint or a power clean, and it does not require oxygen.

正确答案是 B，肌酸激酶。该酶促进磷酸基团从 PC 快速转移至 ADP，形成 ATP。反应为：PC + ADP → ATP + 肌酸。该系统为持续最长10秒的活动（如100米短跑或高翻）提供即时能量，并且不需要氧气。

ATPase (A) hydrolyses ATP to release energy, not resynthesise it. Phosphofructokinase (C) is a rate-limiting enzyme in glycolysis, and lactate dehydrogenase (D) converts pyruvate to lactate during anaerobic glycolysis. A common mistake is to confuse the enzymes involved in breakdown with those in synthesis, so memorise the specific roles.

ATP酶 (A) 水解 ATP 释放能量，而非再合成。磷酸果糖激酶 (C) 是糖酵解的限速酶，乳酸脱氢酶 (D) 在无氧糖酵解中将丙酮酸转化为乳酸。常见的错误是混淆参与分解与合成的酶，因此要牢记各自的具体作用。

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3. Question 2: The Lactate System and 400m Sprint Fatigue | 问题2：乳酸系统与400米短跑的疲劳

Question: ‘During a 400m sprint, an athlete relies heavily on the lactate system. Explain how this system produces ATP and discuss the cause of fatigue associated with it.’ (6 marks)

问题：“在400米短跑中，运动员严重依赖乳酸系统供能。解释该系统如何产生 ATP，并讨论与之相关的疲劳原因。”(6分)

The lactate system, or anaerobic glycolytic system, breaks down glucose through glycolysis in the sarcoplasm. Glucose (C₆H₁₂O₆) is converted to pyruvate, and when oxygen is insufficient, pyruvate is converted to lactate by lactate dehydrogenase, yielding a net gain of 2 ATP per glucose molecule. This system dominates high-intensity efforts lasting 30–90 seconds.

乳酸系统，即无氧糖酵解系统，在肌浆中通过糖酵解分解葡萄糖。葡萄糖 (C₆H₁₂O₆) 转化为丙酮酸，当氧气不足时，丙酮酸被乳酸脱氢酶转化为乳酸，每分子葡萄糖净得2个ATP。该系统主导持续30–90秒的高强度运动。

Fatigue during the 400m is mainly caused by the accumulation of hydrogen ions (H⁺) dissociating from lactic acid. These H⁺ ions lower muscle pH, inhibiting key glycolytic enzymes like phosphofructokinase and disrupting the binding of calcium ions to troponin, which impairs cross-bridge formation. This results in reduced muscular contraction force. It is not lactate itself but the acidosis that causes peripheral fatigue.

400米跑中的疲劳主要由于乳酸的氢离子 (H⁺) 解离并累积所致。这些 H⁺ 离子降低肌肉 pH 值，抑制磷酸果糖激酶等关键糖酵解酶，并干扰钙离子与肌钙蛋白的结合，从而损害横桥形成。这导致肌肉收缩力量下降。引起外周疲劳的是酸中毒，而非乳酸本身。

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4. Question 3: Oxygen Deficit and EPOC | 问题3：氧亏与运动后过量氧耗

Question: Describe oxygen deficit and excess post-exercise oxygen consumption (EPOC), and explain their underlying physiological processes. (8 marks)

问题：描述氧亏和运动后过量氧耗 (EPOC)，并解释其背后的生理过程。(8分)

Oxygen deficit occurs at the onset of exercise when oxygen demand exceeds oxygen supply. During this period, the ATP-PC and lactate systems provide anaerobic energy until the cardiorespiratory system catches up and steady-state oxygen consumption is achieved. The size of the oxygen deficit depends on exercise intensity and the individual’s aerobic fitness.

氧亏产生于运动初期，此时需氧量超过供氧量。在此阶段，ATP-PC 和乳酸系统提供无氧能量，直到心肺系统跟上并达到稳态耗氧量。氧亏的大小取决于运动强度和个人有氧适能。

EPOC, formerly called ‘oxygen debt’, refers to the elevated oxygen consumption after exercise, which serves to restore the body to its pre-exercise state. It has two components: the fast component, replenishing ATP-PC stores and re-saturating myoglobin with oxygen; and the slow component, removing lactate, lowering elevated body temperature and heart rate, and supporting the increased metabolic rate due to elevated hormones. EPOC is greater after high-intensity exercise due to larger disturbances in homeostasis.

EPOC，原称“氧债”，指运动后出现的摄氧量提高，用于将身体恢复到运动前状态。它有两个组成部分：快速部分，用于补充 ATP-PC 储备并使肌红蛋白重新饱和氧气；慢速部分，用于清除乳酸、降低升高的体温和心率，并支持因激素升高而增加的代谢率。高强度运动后 EPOC 更大，因为体内稳态受到更大扰动。

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5. Question 4: Interpreting Heart Rate Data during Interval Training | 问题4：解读间歇训练中的心率数据

Question: The graph shows heart rate (bpm) of an athlete during a 4 x 800m interval session with 3-minute passive recovery between reps. Analyse the data and explain the physiological reasons for the heart rate pattern observed. (10 marks)

问题：图表显示了一名运动员在4 × 800米间歇训练中的心率 (bpm)，组间进行3分钟被动恢复。分析数据并解释所观察到的该心率模式的生理原因。(10分)

At the start of each repetition, heart rate rises sharply due to anticipatory rise and the rapid increase in oxygen demand by working muscles. This is driven by sympathetic nervous stimulation, releasing adrenaline and noradrenaline, which increase heart rate and contractility. During the 800m effort, heart rate climbs to near-maximal levels (e.g., 190–200 bpm) as the body relies on a combination of aerobic and anaerobic energy systems.

在每组开始时，心率急剧上升，这是由于预期性升高以及工作肌肉需氧量迅速增加所致。此过程由交感神经刺激驱动，释放肾上腺素和去甲肾上腺素，从而提升心率和收缩力。在800米跑中，心率攀升至接近最大水平（如190–200 bpm），因为身体依赖有氧与无氧能量系统的组合供能。

During the 3-minute passive recovery, heart rate decreases but does not return to resting levels. This reflects the continued oxygen consumption to repay the oxygen deficit and support EPOC processes. Over successive repetitions, there is often a cardiovascular drift: heart rate trends higher due to dehydration, reduced stroke volume, and thermoregulatory demands. Analysis of such data should quantify peak heart rates, recovery heart rates, and note any upward drift, linking each observation to specific physiological mechanisms.

在3分钟被动恢复期间，心率下降但不回归静息水平。这反映了持续摄氧以补偿氧亏并支持 EPOC 过程。连续重复后常出现心血管漂移现象：心率逐渐升高，这是由脱水、每搏输出量减少以及体温调节需求共同造成的。分析此类数据应量化峰值心率、恢复心率，并记录任何上升漂移，将每个观察结果与特定的生理机制相联系。

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6. Question 5: Reversibility and Detraining Effects | 问题5：可逆性原则与停训效应

Question: An endurance athlete sustains an injury and stops training for 6 weeks. Using the principle of reversibility, evaluate the physiological changes that occur and their impact on performance. (6 marks)

问题：一名耐力运动员受伤并停止训练6周。运用可逆性原则，评价发生的生理变化及其对运动表现的影响。(6分)

The principle of reversibility states that training adaptations are lost when training ceases. Detraining leads to a decline in cardiovascular and metabolic fitness. Key changes include a reduction in stroke volume due to decreased blood plasma volume, which lowers maximal cardiac output and VO₂ max by up to 10–20% in the first few weeks. Mitochondrial density and oxidative enzyme activity also decline, reducing the muscle’s capacity to utilise fat and increasing reliance on carbohydrate, which can cause earlier glycogen depletion.

可逆性原则指停止训练后，训练适应会逐渐丧失。停训导致心血管和代谢适能下降。主要变化包括：由于血浆量减少导致每搏输出量下降，从而使最大心输出量和最大摄氧量在最初几周下降10–20%。线粒体密度和氧化酶活性也降低，削弱肌肉利用脂肪的能力，并增加对碳水化合物的依赖，这可能导致糖原更快耗竭。

Furthermore, lactate threshold decreases, meaning the athlete will accumulate lactate at lower exercise intensities. Muscle atrophy and reduced capillary density impair oxygen delivery. Psychologically, detraining can reduce motivation and movement efficiency. The impact is particularly severe in highly trained individuals whose baseline fitness is high, and they will require a carefully graded retraining programme to regain previous performance levels.

此外，乳酸阈下降，意味着运动员在更低的运动强度下就会累积乳酸。肌肉萎缩和毛细血管密度降低会损害氧气输送。心理上，停训可能会降低动机与动作效率。在训练有素的个体中影响尤为严重，他们的基础适能较高，需要精心设计的恢复训练计划来恢复到以往的表现水平。

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7. Question 6: Periodisation for a Football Player | 问题6：为足球运动员设计周期化训练

Question: Design a training macrocycle for a professional football player, applying principles of periodisation. Justify your choice of training methods and intensity across the preparatory, competitive, and transition phases. (10 marks)

问题：运用周期化原则为职业足球运动员设计一个训练大周期。论证你在准备期、比赛期和过渡期选择的训练方法和强度。(10分)

A macrocycle typically spans one year. In the preparatory phase (pre-season), the focus is on general conditioning: aerobic base training using continuous and Fartlek methods at 60–75% HR max to develop oxidative capacity, alongside resistance training for muscular endurance and hypertrophy. As the competitive phase approaches, training becomes more specific with high-intensity interval training (HIIT) to improve repeated sprint ability, and plyometrics for explosive power.

一个大周期通常跨度为一年。在准备期（季前），重点是建立一般体能：采用持续训练和法特莱克训练法，强度在60–75%最大心率，以发展氧化能力，同时进行抗阻训练增强肌耐力和肌肉肥大。临近比赛期，训练变得更加专项，采用高强度间歇训练 (HIIT) 来提升反复冲刺能力，以及增强式训练增加爆发力。

During the competitive phase, intensity is highest but volume is reduced to avoid fatigue. Training sessions mirror match demands, including small-sided games and tactical drills. The principle of tapering is applied before key matches to ensure peak performance. The transition phase (off-season) involves active rest and low-intensity cross-training to aid psychological and physical recovery while minimising detraining effects. Justification must link each method to the specific energy system demands of football, which relies on the aerobic system for recovery between sprints and the ATP-PC/lactate system during high-intensity actions.

在比赛期，训练强度达到最高但训练量减少以避免疲劳。训练课模拟比赛需求，包括小场地比赛和战术演练。在关键比赛前运用减量原则以确保巅峰表现。过渡期（淡季）包含积极休息和低强度交叉训练，以促进身心恢复，同时尽量减少停训效应。论证部分必须将每种方法与足球特定的能量系统需求联系起来，足球依赖有氧系统在冲刺间进行恢复，并在高强度动作中依赖 ATP-PC/乳酸系统。

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8. Common Pitfalls and Examiner Advice | 常见错误与考官建议

Many students lose marks by not reading the command word carefully. ‘Describe’ means you state what happens without analysis; ‘explain’ requires giving reasons; ‘evaluate’ demands balanced arguments with a conclusion. Never use bullet points in extended answers unless the question explicitly permits it. Instead, write in coherent paragraphs. Another frequent error is failing to link physiological concepts to sporting examples; even a brief reference to a relevant sport can move an answer into the top band.

许多学生因未仔细阅读指令词而失分。“描述”意味着陈述发生了什么而不加分析；“解释”要求给出原因；“评价”则要求提供平衡的论据并得出结论。除非题目明确允许，否则切勿在拓展作答中使用项目符号。应撰写连贯的段落。另一个常见错误是未能将生理学概念与运动实例相联系；即使是简短地提及相关运动，也能使答案进入高分档。

In data-analysis questions, always quote numbers to show you have used the data – for example, ‘heart rate decreased from 195 bpm to 140 bpm during the first minute of recovery’. Use precise terminology throughout; avoid colloquial phrases. Finally, manage your time effectively: if a question is worth 4 marks, plan to write about four distinct points, and move on once you have delivered them to avoid spending too long on one section.

在数据分析题中，务必引用数字以证明你使用了数据——例如，“在恢复的第一分钟，心率从195 bpm下降至140 bpm”。全程使用精确术语，避免口语化表达。最后，有效管理时间：如果某题价值4分，则计划写下大约四个不同的要点，写出后立即进入下一题，避免在一题上花费过长时间。

Published by TutorHao | Physical Education Revision Series | aleveler.com

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