Responses of the body systems to a single sport or exercise ses

During a weight-bearing exercise such as running, which cells break down old bone tissue to allow new bone growth?

• Osteoblasts
• Osteocytes
• Osteoclasts
• Chondrocytes

What happens to synovial fluid during an exercise session?

• It decreases and becomes thicker
• It increases and becomes less viscous
• It stays the same
• It evaporates from the joint capsule

Why is the reduction in synovial fluid viscosity important during activity?

• It makes joints weaker
• It increases joint friction
• It improves joint lubrication and movement
• It reduces oxygen supply to the joint

Which muscle fibres are mainly recruited during low-intensity, long-duration activities like jogging?

• Type IIx
• Type IIa
• Type I
• Type Ib

Why does blood flow to working muscles increase during exercise?

• To remove waste products and deliver oxygen
• To cool the skin
• To store glycogen
• To prevent lactic acid formation

Micro-tears in muscle fibres are most associated with:

• Flexibility training
• Aerobic exercise
• Resistance training
• Balance training

Which of the following is a physiological reason muscles feel warmer during exercise?

• Increase in blood flow and metabolic activity
• Decrease in oxygen demand
• Reduction in muscle recruitment
• Evaporation of synovial fluid

What triggers the increase in breathing rate at the start of exercise?

• Hormone release only
• Neural and chemical control
• Cardiac output
• Temperature change only

Which respiratory muscle is primarily responsible for inspiration at rest?

• Rectus abdominis
• Diaphragm
• Sternocleidomastoid
• Intercostal muscles

Which additional skeletal muscle assists breathing during intense exercise?

• Biceps brachii
• Deltoid
• Sternocleidomastoid
• Gluteus maximus