GCSE PE: Understanding Respiratory Mechanics During Exercise

Why is it important to understand respiratory mechanics for GCSE PE?

• It's a key topic in the examination.

• To improve athletic performance.

• For general health and wellness.

• To enhance breathing techniques only.

What is the primary function of the intercostal muscles during inhalation?

• They contract to lift the ribs up and out, enlarging the chest cavity.

• They assist in the downward movement of the diaphragm.

• They relax to decrease the chest cavity size.

• They contract to move the ribs down and in.

How does the diaphragm change during inhalation?

• It remains static to maintain pressure balance.

• It contracts and moves downwards, increasing chest cavity size.

• It relaxes and flattens, increasing chest cavity size.

• It contracts and moves upwards.

What causes air to move into the lungs during inhalation?

• The contraction of abdominal muscles.

• A vacuum effect created by the heart's movement.

• Air moves from a high pressure area outside to a low pressure area inside the lungs.

• The pressure inside the lungs is greater than outside.

How does the chest cavity change size during inhalation?

• It increases as the ribs move up and out.

• It remains the same size but changes shape.

• It decreases as the intercostal muscles contract.

• It decreases due to diaphragm relaxation.

During exhalation, what happens to the diaphragm?

• It assists the intercostal muscles in pulling the ribs up.

• It contracts and moves downwards.

• It relaxes and moves upwards, returning to a dome shape.

• It expands to increase lung capacity.

What is the effect of the atmospheric pressure inside the lungs during exhalation?

• It increases, pushing air out.

• It has no effect on the exhalation process.

• It remains constant to balance external pressure.

• It decreases to facilitate air intake.

Which muscles assist in increasing lung capacity during exercise?

• Intercostal and abdominal muscles.

• Abdominals and diaphragm.

• Diaphragm and intercostal muscles.

• Pectorals and sternocleidomastoid muscles.

What role do the abdominals play during exhalation in exercise?

• They expand to increase the chest cavity.

• They contract to pull the ribs upwards.

• They forcefully pull the ribs downwards, aiding in expelling carbon dioxide.

• They help in the inhalation process.

What is encouraged at the end of the video for further engagement?

• Participating in physical exercises.

• Consulting a PE teacher directly.

• Sharing questions or concerns in the comment section.

• Subscribing to health and wellness magazines.