Physics for You : Summary

1
Summary
Fit for life low demand

• Blood in arteries is under pressure created by
  contraction of heart muscles. This is so that
  blood reaches all parts of the body.
• Glucose reacts with oxygen in cells to release
  energy. This process is called respiration.
• During exercise, breathing and pulse rates
  increase. This delivers oxygen and glucose to
  muscles more quickly, and removes carbon dioxide
  from muscles more quickly.

OCR B1a
Page 1
2
Summary
Fit for life standard demand

• Blood pressure measurements have 2 parts, the
  diastolic and the systolic. Blood pressure is
  measured in millimetres of mercury (mmHg).
• Age diet, exercise, weight, alcohol intake and
  stress are all factors that affect blood
  pressure.
• Fitness is the bodys adaptation to physical
  activity. If you are healthy you are free from
  infection.
• The word equation for aerobic respiration is
• glucose oxygen carbon dioxide
  water
• 
  ( energy).

OCR B1a
Page 2
3
Summary
Fit for life standard demand

• During hard exercise, the oxygen supply to the
  muscles is not enough for aerobic respiration to
  meet energy demand. So anaerobic respiration
  takes place as well. Anaerobic respiration
  produces lactic acid which accumulates in muscles
  causing pain and fatigue.
• The word equation for anaerobic respiration is
• glucose lactic acid (
  energy).
• Anaerobic respiration releases much less energy
  than aerobic respiration.

OCR B1a
Page 3
4
Summary
Fit for life high demand

• High blood pressure can lead to burst blood
  vessels, damage to brain, stroke and kidney
  damage.
• Low blood pressure can lead to dizziness,
  fainting and poor circulation.
• Fitness can be measured in different ways
  strength, stamina, flexibility, agility, speed,
  and cardiovascular efficiency.

OCR B1a
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5
Summary
Fit for life high demand

• The symbol equation for aerobic respiration is
• C6H12O6 6O2? 6CO2 6H2O ( energy).
• Hard exercise causes a lack of oxygen in cells.
  If your muscles uses anaerobic respiration
  glucose is not broken down completely and lactic
  acid builds up. Lactic acid build up causes an
  oxygen debt which is removed during recovery.
• When you recover you continue to pant which
  replaces oxygen allowing aerobic respiration to
  take place. Increased heart rate ensures blood
  carries lactic acid away from the muscles to the
  liver.

OCR B1a
Page 5