📚 Year 11 OCR PE: Unit Test Mock Paper Analysis | Year 11 OCR 体育：单元测试模拟卷解析
This article breaks down a typical Year 11 OCR GCSE Physical Education unit test, offering model answers and detailed explanations to strengthen your exam technique. Each section mirrors the style of exam questions found in Paper 1 (Physical factors affecting performance) and the applied anatomy, physiology and movement analysis components.
本文解析一份典型的 Year 11 OCR GCSE 体育单元测试卷，提供参考答案与详细解释，旨在强化你的应试技巧。每个部分均对应试卷一（影响表现的物理因素）以及应用解剖学、生理学与运动分析部分常见的出题风格。
1. Skeletal System Functions | 骨骼系统功能
Question: A rugby player is engaged in a scrum, where large forces are applied through the shoulders and torso. Which function of the skeleton is MOST critical in this situation? A. Blood cell production B. Protection of vital organs C. Mineral storage D. Movement facilitation
题目：一名橄榄球运动员在司克兰（scrum）中承受通过肩膀和躯干传来的巨大力量。此时骨骼的哪项功能最为关键？A. 血细胞生成 B. 保护重要器官 C. 矿物质储存 D. 促进运动
Answer: B. Protection of vital organs. The rib cage provides a rigid barrier around the heart and lungs, while the vertebral column shields the spinal cord. In contact sports such as rugby, these structures absorb and deflect impact forces, reducing the risk of serious internal injury.
答案：B. 保护重要器官。胸廓在心脏和肺周围形成刚性屏障，脊柱则保护脊髓。在橄榄球等对抗性运动中，这些结构能吸收和转移冲击力，降低严重内伤的风险。
Explanation: The skeleton also performs support, blood cell production (in bone marrow), mineral storage (calcium) and lever-based movement, but during a collision the protective role dominates.
解析：骨骼还具备支撑、血细胞生成（骨髓内）、矿物质储存（钙）以及基于杠杆的运动功能，但在碰撞发生的瞬间保护作用占据主导地位。
2. Joint Classification and Movement | 关节分类与运动
Question: During the upward phase of a dumbbell bicep curl, identify the type of synovial joint working and the main movement occurring. Then name the movement as the dumbbell is lowered back to the start. (2 marks)
题目：在哑铃二头肌弯举向上阶段，指出正在工作的滑膜关节类型以及发生的主要运动。当哑铃还原至起始位置时，说出该运动的名称。（2分）
Answer: The elbow is a hinge joint. During the upward phase flexion occurs (angle at the joint decreases). Lowering the weight involves extension (angle increases).
答案：肘关节为铰链关节。向上阶段发生屈曲（关节角度减小）。放下重量时完成伸展（角度增大）。
Key detail: Hinge joints, such as the elbow and knee, allow movement in one plane only – flexion and extension. Smooth articular cartilage and synovial fluid minimise friction, while ligaments prevent sideways displacement.
关键细节：铰链关节（如肘和膝）仅允许在一个平面内运动——屈和伸。光滑的关节软骨和滑液可减小摩擦，韧带则防止侧向移位。
3. Muscular System: Antagonistic Pairs | 肌肉系统：拮抗肌对
Question: In the concentric phase of a squat (rising from the lowest point), the quadriceps group acts as the agonist. Name the antagonist muscle group and describe its action during this phase. (2 marks)
题目：在深蹲的向心阶段（从最低点起身），股四头肌群作为主动肌。说出拮抗肌群名称并描述其在此阶段的作用。（2分）
Answer: The antagonist is the hamstring group (e.g. biceps femoris). It relaxes and lengthens to allow the quadriceps to contract and extend the knee without resistance.
答案：拮抗肌为腘绳肌群（如股二头肌）。它放松并被拉长，以便股四头肌收缩伸膝而不受对抗。
Application: Understanding agonist-antagonist pairs helps coaches design balanced training programmes. For instance, strong quadriceps without equally conditioned hamstrings can increase injury risk. The gluteus maximus and abdominal muscles often act as fixators during squats, stabilising the trunk.
应用：理解主动肌与拮抗肌配对有助于教练设计平衡的训练计划。例如，股四头肌强壮而腘绳肌未经同等训练会增加受伤风险。深蹲时臀大肌和腹部肌群通常作为固定肌，稳定躯干。
4. Cardiovascular System: Stroke Volume and Cardiac Output | 心血管系统：每搏输出量与心输出量
Question: A 16-year-old athlete has a resting heart rate of 55 bpm and a resting stroke volume of 75 ml. (a) Calculate their cardiac output at rest. (b) Explain how and why stroke volume changes during a 1500 m maximal effort run. (4 marks)
题目：一名16岁运动员静息心率为55次/分，静息每搏输出量为75毫升。(a) 计算其静息心输出量。(b) 解释在1500米最大努力跑中每搏输出量如何变化及其原因。（4分）
Answer (a): Cardiac output = Heart rate × Stroke volume. CO = 55 bpm × 75 ml = 4125 ml/min (4.125 L/min).
答案 (a)：心输出量 = 心率 × 每搏输出量。CO = 55次/分 × 75 ml = 4125 毫升/分（4.125 升/分）。
Cardiac Output (Q) = HR × SV
心输出量 (Q) = 心率 × 每搏输出量
Answer (b): During maximal exercise, stroke volume increases because greater venous return stretches the ventricle walls (Starling’s law), causing a more forceful contraction. It may rise from 75 ml to around 110–130 ml before plateauing. This helps deliver more oxygen to working muscles.
答案 (b)：最大强度运动时每搏输出量增加，因为增大的静脉回流量拉伸心室壁（斯塔林定律），引发更有力的收缩。其值可从75毫升升至约110–130毫升后趋于平台。这有助于向工作肌输送更多氧气。
| Condition | HR (bpm) | SV (ml) | Q (L/min) |
| Rest | 55 | 75 | 4.1 |
| Maximal Exercise | 190 | 120 | 22.8 |
5. Respiratory System: Tidal Volume and Minute Ventilation | 呼吸系统：潮气量与每分通气量
Question: During a swimming training set, a performer breathes 40 times per minute with an average tidal volume of 1.5 litres. Calculate minute ventilation. Explain the difference between tidal volume and vital capacity. (3 marks)
题目：游泳训练中，运动员每分钟呼吸40次，平均潮气量为1.5升。计算每分通气量。解释潮气量与肺活量的区别。（3分）
Answer: Minute ventilation (VE) = Tidal volume (TV) × Breathing frequency (f). VE = 1.5 L × 40 = 60 L/min. Tidal volume is the air moved in and out per normal breath; vital capacity is the maximum air that can be forcibly exhaled after a maximum inhalation.
答案：每分通气量 (VE) = 潮气量 (TV) × 呼吸频率 (f)。VE = 1.5升 × 40 = 60升/分。潮气量是每次平静呼吸进出肺的空气量；肺活量是最大吸气后能用力呼出的最大空气量。
Minute Ventilation = Tidal Volume × Frequency
每分通气量 = 潮气量 × 呼吸频率
During intense exercise, both tidal volume and breathing frequency rise to meet oxygen demand. Tidal volume reaches about 50–60% of vital capacity, and breathing rate can exceed 50 bpm in trained athletes.
剧烈运动中，潮气量和呼吸频率均会升高以满足氧气需求。潮气量约达肺活量的50%–60%，训练有素的运动员呼吸频率可超过50次/分。
6. Principles of Training: Specificity | 训练原则：针对性
Question: A 400 m hurdler spends three sessions per week practising block starts, hurdle clearance, and maintaining rhythm between hurdles. Identify and explain the principle of training being applied. (2 marks)
题目：一名400米跨栏运动员每周三次练习起跑器起跑、过栏以及栏间节奏保持。指出并解释所应用的训练原则。（2分）
Answer: Specificity. The training replicates the exact movement patterns, energy system demands (anaerobic lactic) and coordination requirements of the event, ensuring the body makes targeted adaptations.
答案：针对性。训练复制了该项目精确的动作模式、能量系统需求（无氧乳酸）以及协调要求，能确保身体产生针对性适应。
Further link: A shot putter who only jogs would violate specificity because jogging develops aerobic endurance, not the explosive strength required for the event. OCR often asks candidates to connect training activities to the muscles, energy systems and skills used in the sport.
进一步联系：铅球运动员如果只进行慢跑，就违背了针对性原则，因为慢跑发展的是有氧耐力，而非该项目所需的爆发力。OCR 常要求考生将训练活动与运动中所用的肌肉、能量系统和技能联系起来。
7. Levers in the Body | 身体中的杠杆
Question: When a dancer rises onto the balls of her feet (plantar flexion), a lever system operates. Identify the class of lever, and state the positions of the fulcrum, effort and load. Draw a simple diagram to support your answer. (3 marks)
题目：当舞者用前脚掌站立（跖屈）时，一个杠杆系统在发挥作用。指出杠杆类别，并说明支点、力点和阻力点的位置。画出简图以辅助回答。（3分）
Answer: This is a second-class lever. The fulcrum is the ball of the foot, the load is the body weight (acting through the ankle), and the effort is provided by the gastrocnemius muscle pulling on the calcaneus. The load sits between the fulcrum and the effort.
答案：此为第二类杠杆。支点为前脚掌，阻力为体重（通过踝关节作用），动力由腓肠肌牵拉跟骨提供。阻力位于支点与动力之间。
| Lever Class | Fulcrum | Effort | Load | Example |
| Second class | Ball of foot | Gastrocnemius (via Achilles tendon) | Body weight | Standing on tiptoes |
| Third class (for comparison) | Elbow | Biceps brachii (insertion on radius) | Weight in hand | Bicep curl |
8. Sport Injuries: RICE Protocol | 运动损伤：RICE 原则
Question:
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