PHED1 - June 2012 Flashcards
Explain how the health of a performer may affect their fitness.
Can be unhealthy and unable to train so fitness declines.
Can be unhealthy but able to train and fitness can still improve.
Explain how increases in CO2 and acidity in the blood cause breathing rate to rise.
Detected by chemoreceptors (in medulla).
Nerve impulses to RCC.
Nervous output to breathing muscles/sympathetic nerve.
Increased rate of contraction of diaphragm and intercostal muscles.
Identify the membranes involved in this diffusion and identify one characteristics of these membranes that allows diffusion to happen.
Alveolar and capillary membranes identified.
Requires thin membranes/one cell thick.
Requires short diffusion distance between membranes/moist etc.
Name two components of skill-related fitness required by a 400m hurdler.
Balance.
Co-ordination.
Name two components of health-related fitness required by a shot putter.
Strength.
Power.
State 3 characteristics or functions of arteries.
Thick elastic walls.
Small lumen.
Smooth muscle layer.
Carrying blood away from the heart.
Where is myoglobin found in the body and what is it’s role during exercise?
In muscle.
Stores/carries oxygen.
Explain the causes of the curve shifting right and the effect that this change has on oxygen delivery to the muscles.
Increase in body temperature.
Increase in blood CO2 concentration.
Increase in blood acidity.
Bohr shift.
Resulting in less saturation of haemoglobin with oxygen.
An increase in oxygen release to muscles.
Explain how players use their STM to perform skills during a team game.
Receives info from STSS/senses.
Selective attention filters info.
Compares characteristics of info from LTMS/DCR process.
Decisions made.
Receives info concerning actions from LTM.
Initiates motor programmes.
Explain what an open skill is?
Involves changing environment/need to make decisions about how to adapt eg open play situation, passing.
Explain what a closed skill is.
Involves same environment/few decisions about how to perform skill, just when to perform eg dead ball situation, set piece.
Explain the difference between the terms movement time and reaction time.
Movement time-the time taken from the initiation of the movement to the finish of the movement/pass.
Reaction time-the time taken to decide a response/type of pass to a given stimulus.
Choice reaction time is far more common in team games than simple reaction time. Explain this statement.
Choice reaction time-numerous stimuli and or responses and simple reaction time-one stimulus and one possible response.
Games-open skills need CRT mainly/few SRT skills.
What can games players do to improve their response time?
Concentration on cues. Relevant practice/over learning. Be at optimum arousal level. Temporal/spatial anticipation. Improve movement time.
What are the characteristics of a skilled performance?
Consistent. Efficiency. Controlled. Minimal outlay of energy. Aesthetically pleasing.