Flashcards
Topic 5
Cards in this deck (20)
- 1What is Work?Scientifically is the exertion of force overcoming resistance or producing molecular change
- 2What are the 3 main types of biological work?➢ Chemical work
➢ Active transport
➢ Mechanical work - 3What is chemical work?Synthesis and break down of larger molecules (energy into creating chemical bonds in making bigger structures from smaller structures)
- 4What is Active Transport?Moving ions and particles across cell membranes against the concentration gradient
- 5What is Mechanical work?Cellular functions that result in movement (i.e. muscle contraction) (also mitosis – cell division)
- 6What is resting metabolic rate?The rate of metabolic activity within the body at a state of rest (requires energy)
- 7What are the percentages of metabolism per organ?o Brain (18%)
o Heart (33%)
o Liver (15%)
o Kidneys (33%)
o Everything else (<1%) - 8What is the law of conversion of energy?Energy changes forms and is not created or destroyed in its processes
- 9What is Internal work?Where energy stays in the body
- 10What is external (Mechanical) work?Where energy leaves the body
- 11What is Mechanical work?A force is said to do work when it acts on a body, and there is a displacement of the point of application in the direction of the force
- 12What is the units of Work?Joules (J)
- 13What is the equation for Work?Work (J) = Force (Netwons) x Distance (metres)
- 14What is the equation for Force?Force (N) = Mass (kg) x Acceleration (m/s2)
- 15What else is considered when calculating Force?Constant gravitational force of 9.81
- 16What is Power and what is its equation?The rate at which work is done
Power (W) = Work (J)/Time (secs) - 17What is an ergometer?An exercise apparatus that quantifies and standardises physical activity in terms of input and/or power output
Examples:
➢ Treadmills (degree of inclination – determine vertical distance with SOHCAHTOA)
➢ Cycle ergometers (monarch)
➢ Box
Carefully apply force to calculate force & power - 18How do you calculate power output for Cycling ergometer?Force (N) x Distance (Rotations per minute (rpm) x 6 metres (distance of full rotation) x Time (mins))
- 19How do you calculate power output without time for Cycling ergometer?Power = Force (N) x Distance (Metres)/Time (Seconds)
- 20Dependents on fuelling work?Depends on working rate (differs between individuals based on genetic and assertive behaviours)
Information
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- Exercise Science Flashcards on Topic 5, created by Jack Henderson on 13/06/2018.
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- Jack Henderson
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