Effects of Exercise on Body Systems

This video covers topic 1.5 of the OCR GCSE syllabus, focusing on the effects of exercise on body systems. It details both short-term and long-term effects on the muscular, cardiovascular, and respiratory systems. Short-term effects include increased muscle temperature, lactic acid production, and changes in heart rate and breathing. Long-term effects involve muscular hypertrophy, improved cardiovascular efficiency, and enhanced respiratory capacity. The video concludes with a brief mention of the next topic on fitness components.

What is the primary focus of topic 1.5 in the OCR syllabus?

• The rules of various sports

• The effects of diet on health

• The effects of exercise on body systems

• The history of physical education

Which of the following is a short-term effect of exercise on the muscular system?

• Increase in bone density

• Decrease in muscle temperature

• Increase in muscle temperature

• Decrease in metabolism

What happens to the heart rate just before exercise begins?

• It decreases due to relaxation

• It remains constant

• It stops momentarily

• It increases due to adrenaline release

How does the respiratory system adapt during exercise?

• Breathing rate decreases

• Minute ventilation increases

• Oxygen intake decreases

• Tidal volume decreases

What is muscular hypertrophy?

• Increase in muscle size

• Increase in muscle flexibility

• Decrease in muscle size

• Decrease in muscle strength

Which type of training improves the efficiency of lactic acid removal?

• Anaerobic training

• Balance training

• Flexibility training

• Aerobic training

What is bradycardia?

• A condition of normal heart rate

• A condition of low heart rate

• A condition of irregular heart rate

• A condition of high heart rate

How does exercise affect blood viscosity?

• Increases blood viscosity

• Makes blood viscosity fluctuate

• Has no effect on blood viscosity

• Decreases blood viscosity

What change occurs in the alveoli due to long-term exercise?

• Increase in capillary density

• Decrease in surface area

• Decrease in capillary density

• No change in structure

What is the effect of load-bearing activities on bones?

• Increase in bone density

• Decrease in bone density

• Weakening of bones

• No change in bone density