Across
- 3. the amount of air inspired and expired in one breath
- 5. The recruitment of motor units within a skeletal muscle commences with SMALLER motor units to LARGER motor units. Small motor units are recruited first at LOW muscle forces
- 6. the percentage of fast-twitch and slow-twitch will influence many fitness components
- 7. a protein inside the muscle fibre that carries oxygen to the mitochondria
- 9. the movement of oxygen and carbondioxide at the lungs and the muscles from areas of high to low concentration
- 14. the site inside the muscle fibre of aerobic energy (ATP) production
- 15. a measure of an athlete’s aerobic fitness – it is their max volume of oxygen consumption (ml/kg/min)
- 16. the force of the blood against the artery walls during heart contraction
- 18. one motor neuron and all of the muscle fibres that it stimulates
- 19. microscopic blood vessels where gas exchange occurs
- 20. when blood pools in the veins of the extremities after intense exercise. can be prevented with an active cooldown
- 22. the number of times the heart contracts in one minute
- 23. the amount of air inspired and expired in one minute
- 25. made up of the heart, blood and blood vessels
- 29. The maximum rate of energy production in the presence of oxygen
- 32. a contraction where force is developed as the muscle shortens
- 33. the force of the blood on the artery wall during heart relaxation and filling
- 35. the widening of blood vessels to increase blood flow
- 37. the amount of blood ejected from the heart in one minute
Down
- 1. a contraction where force is developed as the muscle lengthens
- 2. having the capacities to meet the specific demands of the sport
- 3. the body's mechanism by which we maintain body temperature within narrow limits to maintain homeostasis
- 4. the amount of breaths taken in one minute
- 8. the contractile unit of the myofibril
- 10. a protein that binds to redbloodcells a protein found in the red blood cells that carries oxygen in your body and gives blood its red colour
- 11. chemicals that speed up chemical reactions
- 12. carry blood back to the heart with the help of one way valves
- 13. the think filament that is attached to the cross bridges
- 17. the movement of oxygen into the capillaries from the alveoli and carbon dioxide into the alveoli from the capillaries
- 21. the difference between oxgyen concentration between arteries and veins. this represents the amount of oxygen your muscles are extracting from the blood and using for energy
- 24. the narrowing of blood vessels to reduce blood flow
- 26. carry blood away from the heart
- 27. the amount of blood ejected from the heart with each contraction (ml/beat)
- 28. the ability to produce lots of energy quickly without the reliance on oxygen
- 30. a component of the blood that carries oxygen
- 31. these muscle fibres contain few mitochondria and capillaries, have large force and speed but fatigue easily
- 34. these muscle fibres have high levels of myoglobin, mitochondria and capillaries, produce energy (ATP) at a slow rate and have low force and speed production but are very resistant to fatigue
- 36. the thin filament that attaches to the Z line