📚 Year 10 CAIE PE Unit Test Mock Paper Walkthrough | Year 10 CAIE 体育：单元测试模拟卷解析
Welcome to this comprehensive walkthrough of a Year 10 CAIE Physical Education unit test mock paper. This article is designed to help you understand the types of questions that appear in the IGCSE PE examination, covering key topics such as anatomy and physiology, health and fitness, and training principles. By reviewing the answers and detailed explanations, you will reinforce your knowledge and improve exam technique.
欢迎参阅这份 Year 10 CAIE 体育单元测试模拟卷的全面解析。本文旨在帮助你熟悉 IGCSE 体育考试中出现的题型，涵盖解剖与生理学、健康与健身以及训练原则等核心主题。通过阅读答案和详细解释，你将巩固知识并提高应试技巧。
1. Question 1: Functions of the Skeleton | 问题1：骨骼的功能
The first question in the mock paper tested the functions of the skeleton. A typical multiple-choice question asked: “Which of the following is a function of the skeleton? A. Production of digestive enzymes B. Protection of vital organs C. Transmission of nerve impulses D. Regulation of body temperature”. The correct answer is B. Protection of vital organs. The skeleton serves several critical roles: support, providing a rigid frame for the body; protection, shielding delicate organs such as the brain (cranium), heart and lungs (rib cage), and spinal cord (vertebral column); movement, offering attachment points for muscles; mineral storage, particularly calcium and phosphorus; and blood cell production, occurring in the bone marrow. Options A, C, and D describe functions of the digestive, nervous, and integumentary systems respectively, not the skeleton.
模拟卷的第一题考查了骨骼的功能。一道典型的选择题问道：”下列哪项是骨骼的功能？A. 产生消化酶 B. 保护重要器官 C. 传递神经冲动 D. 调节体温”。正确答案是B，保护重要器官。骨骼承担着多项关键功能：支撑，为身体提供刚性框架；保护，为大脑（颅骨）、心脏与肺（肋骨）以及脊髓（脊柱）等器官提供庇护；运动，为肌肉提供附着点；矿物质储存，尤其是钙和磷；以及造血，发生于骨髓。选项A、C、D分别描述了消化系统、神经系统和皮肤系统的功能，与骨骼无关。
2. Question 2: Types of Synovial Joints | 问题2：滑膜关节类型
A common question asks students to identify synovial joint types based on sporting movements. For example: “During a tennis serve, the shoulder joint allows a large range of motion. What type of synovial joint is the shoulder?” The answer is a ball and socket joint. The following table summarises the main synovial joints:
| Joint Type | Movement Allowed | Sporting Example |
|---|---|---|
| Ball and socket | Flexion, extension, rotation, abduction, adduction | Shoulder during swimming stroke |
| Hinge | Flexion and extension only | Knee when kicking a ball |
| Pivot | Rotation | Neck when turning the head |
| Saddle | Flexion, extension, abduction, adduction | Thumb gripping a racket |
一道常见题目要求学生根据运动动作辨识滑膜关节类型。例如：”网球发球时，肩关节允许大幅度活动。肩关节属于哪种滑膜关节？”答案是球窝关节。上表总结了主要滑膜关节类型。球窝关节如肩、髋，可在多平面活动；铰链关节如膝、肘，只允许屈伸；枢轴关节如寰枢关节，允许旋转；鞍状关节如拇指，可对掌。
In the mock paper, the shoulder is correctly identified as a ball and socket joint, which permits movement in all three planes – sagittal, frontal, and transverse – giving the tennis player maximum mobility to generate power. Other options like hinge (elbow, knee) or pivot (neck) would be incorrect because they restrict movement to fewer planes.
在模拟卷中，肩关节被正确认定为球窝关节，因为它可以在三个平面（矢状面、额状面、水平面）上活动，为网球选手提供最大的灵活性以产生力量。其他选项如铰链关节（肘、膝）或枢轴关节（颈部）则会限制活动平面，因此不正确。
3. Question 3: Muscle Contractions | 问题3：肌肉收缩类型
This question assessed knowledge of muscle contraction types. The stem read: “During the downward phase of a bicep curl, the biceps muscle lengthens while still producing force. This is an example of which type of contraction?” The correct choice is eccentric contraction. In an eccentric contraction, the muscle lengthens under tension, controlling the movement. A concentric contraction occurs when the muscle shortens (e.g., lifting the weight), while an isometric contraction involves no change in muscle length (e.g., holding a plank). Isokinetic contractions occur at a constant speed and are rare outside of specialised equipment. Understanding these distinctions is vital for analysing movement phases in sport.
本题评估肌肉收缩类型知识。题干是：”在弯举动作的下降阶段，肱二头肌在产生力量的同时被拉长。这属于哪种收缩？”正确选项是离心收缩。离心收缩时，肌肉在张力下拉长，控制动作。向心收缩是肌肉缩短（如举起重物）；等长收缩则肌肉长度不变（如平板支撑）。等速收缩需特殊设备，保持恒定速度。区分这些收缩类型对于分析运动中的动作阶段至关重要。
4. Question 4: Pathway of Air | 问题4：空气流通路径
A short-answer question required describing the pathway of air from the atmosphere to the alveoli. The correct sequence is: air enters through the nose or mouth → pharynx → larynx → trachea → left and right bronchi → bronchioles → alveoli. Along this pathway, the air is warmed, moistened, and filtered. Gaseous exchange occurs at the alveoli, where oxygen diffuses into the capillaries and carbon dioxide diffuses out. Students often lose marks for omitting key structures like the larynx or confusing the order of bronchi and bronchioles.
一道简答题要求描述空气从外界到达肺泡的路径。正确顺序是：空气经鼻或口吸入 → 咽 → 喉 → 气管 → 左右支气管 → 细支气管 → 肺泡。沿途空气被加温、湿润并被过滤。气体交换发生在肺泡，氧气扩散进入毛细血管，二氧化碳扩散排出。学生常因遗漏喉或混淆支气管与细支气管的顺序而失分。
5. Question 5: Heart Structure and Blood Flow | 问题5：心脏结构与血流
In this labelling and description question, students had to identify the chambers and major vessels on a heart diagram, then explain blood flow through the right side. Deoxygenated blood returns from the body via the superior and inferior vena cava into the right atrium. From there it passes through the tricuspid valve into the right ventricle. Upon contraction, the right ventricle pumps blood through the pulmonary semilunar valve into the pulmonary artery, which carries it to the lungs for oxygenation. It is important to note that the right side of the heart deals entirely with deoxygenated blood, while the left side handles oxygenated blood.
这道识图与描述题要求学生标出心脏各腔室和主要血管，然后解释血液流经右心的过程。缺氧血通过上、下腔静脉从身体返回右心房，经三尖瓣进入右心室。心室收缩时，血液通过肺动脉半月瓣泵入肺动脉，送往肺部进行氧合。需注意心脏右侧全程处理缺氧血，而左侧处理富氧血。
6. Question 6: Components of Fitness | 问题6：体适能要素
A typical application question asked: “Identify the most important health-related component of fitness for a marathon runner and justify your answer.” The expected response was cardiovascular endurance – the ability of the heart and lungs to supply oxygen to the working muscles during sustained physical activity. A marathon runner needs a high aerobic capacity to maintain a steady pace over 42.2 km. While muscular endurance is also relevant, the primary demand is on the cardiovascular system to deliver oxygen and remove waste products efficiently. Other health-related components like flexibility, muscular strength, and body composition play supporting roles but are not the primary factor for distance running.
一道典型的应用题问：”指出马拉松运动员最重要的健康相关体适能要素，并说明理由。”预期答案是心血管耐力——即心肺在持续运动中向工作肌群供氧的能力。马拉松运动员需要高有氧能力才能在42.2公里的全程中保持稳定配速。虽然肌耐力也很重要，但首要需求是心血管系统高效供氧和清除代谢废物。其他健康相关要素如柔韧性、肌力和身体成分起辅助作用，但并非长跑的主要决定因素。
7. Question 7: Principles of Training (FITT) | 问题7：训练原则（FITT）
The mock paper included a scenario where a netball player wished to improve agility. The question required applying the FITT principle (Frequency, Intensity, Time, Type) to design an appropriate training programme. An exemplary answer would suggest: Frequency – 3 times per week, allowing recovery; Intensity – high, with quick changes of direction at near-maximal speed; Time – 20–30 minutes per session of focused agility drills; Type – ladder drills, cone drills, and shuttle runs that mimic game movements. FITT must be tailored to the individual’s current fitness level and progressively overloaded. Simply naming the acronym without specific application would not gain full marks.
模拟卷中有一道情境题，要求为希望提高灵敏性的篮网球运动员应用 FITT 原则（频率、强度、时间、类型）设计训练方案。高分答案示例：频率——每周3次，保证恢复；强度——高强度，接近最大速度的快速变向；时间——每次专注灵敏性训练20–30分钟；类型——模仿比赛的绳梯训练、锥桶训练和折返跑。FITT原则必须结合运动员当前水平并渐进超负荷。仅写出字母缩写而无具体应用无法得全分。
8. Question 8: Calculating Target Heart Rate | 问题8：靶心率计算
Calculation questions often appear in CAIE PE. Here, a 15-year-old athlete with a resting heart rate of 65 bpm needed to determine the target heart rate zone using the Karvonen formula at 60–80% intensity. First, maximum heart rate is estimated: HRmax = 220 − age = 220 − 15 = 205 bpm. Heart rate reserve (HRR) = HRmax − resting HR = 205 − 65 = 140 bpm. The formula is:
Target Heart Rate = (HRmax − Resting HR) × %Intensity + Resting HR
At 60%: (140 × 0.60) + 65 = 84 + 65 = 149 bpm. At 80%: (140 × 0.80) + 65 = 112 + 65 = 177 bpm. The target aerobic training zone is therefore 149–177 bpm. Show all workings, as method marks are awarded even if the final answer has a minor arithmetic error.
计算题在 CAIE 体育考试中经常出现。本题中，一名15岁运动员的安静心率为65 bpm，需用卡氏公式计算60%–80%强度的靶心率区间。首先估算最大心率：HRmax = 220 − 年龄 = 220 − 15 = 205 bpm。心率储备(HRR) = HRmax − 安静心率 = 205 − 65 = 140 bpm。公式为：靶心率 = (HRmax − 安静心率) × 强度% + 安静心率。60% 时：(140 × 0.60) + 65 = 149 bpm；80%：(140 × 0.80) + 65 = 177 bpm。故有氧训练靶心率区为 149–177 bpm。务必展示步骤，即便最终答案有轻微算术错误，仍可获得步骤分。
9. Question 9: Levers in Sport | 问题9：运动中的杠杆
A question on levers read: “A footballer kicking a ball uses a lever system at the knee. Identify the lever class and explain your reasoning.” The answer is a third-class lever. In this arrangement, the effort (force from the quadriceps muscle group) is applied between the fulcrum (knee joint) and the load (resistance of the lower leg and foot plus the ball). Third-class levers are the most common in the human body because they allow a large range of motion and speed, although they require a greater effort to move a given load. This suits actions like kicking where the foot must travel quickly.
一道关于杠杆的题目：”足球运动员踢球时膝关节运用了何种杠杆？请判断杠杆类型并解释。”答案是第三类杠杆。在此系统中，动力（股四头肌群的力量）作用于支点（膝关节）和阻力（小腿与足的重力及球的阻力）之间。人体内以第三类杠杆最为普遍，因为尽管施力较大，却能获得大幅度和高速度的活动，适合踢球时足部需快速移动的需求。
10. Question 10: Short-Term Effects of Exercise | 问题10：运动的短期效应
The final long-answer question asked to explain two short-term effects of exercise on the cardiovascular system. Students were expected to mention increased heart rate (driven by sympathetic nervous stimulation and a demand for more oxygen) and increased stroke volume (the amount of blood pumped per beat). Together these raise cardiac output, ensuring greater oxygen delivery to working muscles. Another valid effect is blood shunting, where vasodilation in arterioles supplying muscles and vasoconstriction to less active organs redirect blood flow where it is needed most. Marks were awarded for using correct terminology and linking the physiological changes to exercise demands rather than just listing effects.
最后一道长答题要求解释运动对心血管系统的两个短期效应。学生需提及心率加快（由交感神经刺激和需氧量增加引起）和每搏输出量增加（每搏泵血量）。两者共同提升心输出量，为工作肌肉输送更多氧气。另一个有效效应是血液重新分配，即供应肌肉的微动脉舒张、非活跃器官的微动脉收缩，将血流导向最需之处。得分要点在于使用规范术语，并将生理变化与运动需求相联系，而非简单罗列效应。
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