OCR GCSE PE: Effects of exercise

Fatigue can be defined as 'muscle tiredness when the body has a lack of energy'.

• True

• False

When we exercise, our muscles feel warmer due to increased blood flow to muscles

• True

• False

What waste product is generated in the muscle during aerobic exericse?

• Carbon dioxide

• Lactic acid

What waste product is produced at the muscle during anaerobic respiration which causes muscles to stop working?

• Carbon dioxide

• Lactic acid

What happens to heart rate and breathing rate during exercise to remove carbon dioxide and lactic acid?

• They stay the same

• The decrease

• They increase

When we exercise, blood is redistributed to the working muscles from organs of a lesser priority. This is called...

• Vascular shift

• Vasocontriction shift

• Vascular shunt

• Vascular buffer

During exercise, more oxygen is delivered to the working muscles. What acts as a 'backpack' for the oxygen and is attached to a red blood cell?

• Iron

• Calcium

• Vitamin D

• Haemoglobin

Vasodilation is the process of blood vessels getting smaller to restrict blood flow.

• True

• False

During exercise, why does tidal volume increase?

• To restrict the amount of air going into and out of the lungs.

• To enable more air to enter and leave the lungs per breath

Breathing rate x tidal volume =