第 1 题
1 分During exercise in a hot environment, the body may experience cardiovascular drift. What is the primary characteristic of this physiological phenomenon during prolonged, steady-state exercise?
Cambridge OCR A Level · Physical Education - H555
高溫環境運動：练习题
5 道选择题即时批改，另有 5 道文字题附完整解题步骤，全部围绕「高溫環境運動」。
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第 2 题
1 分In conditions of extreme heat, a marathon runner experiences cardiovascular drift. Which statement best explains the mechanism and resulting effect on the cardiovascular system during this phenomenon?
第 3 题
1 分During prolonged exercise in the heat, the body must balance metabolic demand with thermoregulation. Evaluate the impact of peripheral vasodilation on the cardiovascular system during this process.
第 4 题
1 分Which of the following describes the most significant chronic adaptation to exercise in the heat that aids in maintaining a lower core temperature during performance?
第 5 题
1 分Analyze the oxyhaemoglobin dissociation curve in the context of an athlete exercising in high heat. What is the effect of the temperature increase on oxygen delivery at the muscles?
第 6 题
3 分Outline why cardiovascular drift is more pronounced when exercising in the heat compared to a temperate environment.
先自己写一遍答案，再对照解题步骤。
第 7 题
5 分During exercise at a constant high intensity, cardiovascular drift may occur. Explain the physiological mechanism behind this phenomenon and how it affects stroke volume and heart rate.
先自己写一遍答案，再对照解题步骤。
第 8 题
6 分Analyze how the vascular shunt mechanism and the vasomotor centre interact to facilitate temperature regulation during prolonged exercise in high ambient temperatures.
先自己写一遍答案，再对照解题步骤。
第 9 题
5 分Elite marathon runners often struggle with cardiovascular drift when competing in high-ambient temperatures.
(a) Define the term cardiovascular drift and describe the physiological process that leads to its occurrence during prolonged exercise in the heat.
(b) Explain how the redistribution of cardiac output to the skin for temperature regulation impacts stroke volume and heart rate to maintain cardiac output.
先自己写一遍答案，再对照解题步骤。
第 10 题
6 分During a triathlon held in 35°C heat, an athlete experiences a significant rise in core body temperature.
(a) Describe the role of the vasomotor centre and pre-capillary sphincters in the redistribution of cardiac output during exercise in these conditions.
(b) Explain the potential respiratory and cardiovascular risks associated with exercising in extreme heat if the body fails to maintain homeostasis through temperature regulation.
先自己写一遍答案，再对照解题步骤。
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