PE NIPPS cardiac function 0.0 / 5 ? Physical EducationAnatomy & physiologyASAQA Created by: hopevioletCreated on: 14-04-14 08:11 what does SYSTOLE & DIASTOLE mean? systole=CONTRACTION diastole=RELAXING 1 of 27 what blood vessels lead blood out of the heart? pulmonary artery (to lungs) ; aorta (to body) 2 of 27 what blood vessel carries oxygenated blood into the heart? pulmonary vein (superior & inferior vena cava = unoxygenated) 3 of 27 what happens to HR as exercise intensity increases bpm increases 4 of 27 cardiac output (Q) = ??? HR x SV (Q=amount of blood pumped from left ventricle per min) 5 of 27 effects of training on an athletes heart? hypertrophy (muscle growth) of heart; braydycardia (HR 6 of 27 explain briefly 'anticipatory rise' heart rate starts to to increase before exertion(increased adrenaline) 7 of 27 what does 'ejection fraction' represent? % of blood entering the left ventricle of which is pumped out per beat 8 of 27 how can training increase the ejection of the heart? (norm=60%) cardiac fibres stretch;increases strength of contraction 9 of 27 describe 'starlings law' (1) SV increases as diastolic filling of ventricles increase 10 of 27 describe 'starlings law' (2) ventricles stretch more so become more forceful 11 of 27 three parts of venus return? pocket valves, muscle pump, respiratory pump 12 of 27 briefly explain cardiovascular drift hot/endurance; HR increases; blood to skin to cool(sweat); blood volume decreases; less blood to heart; =Q&HR increase (as SV decreases) 13 of 27 what is the main regulator of the heart? cardiac control centre 14 of 27 sympathetic nervous system; increase or decrease HR? increase HR 15 of 27 parasympathetic nervous system; increase or decrease HR? decrease HR 16 of 27 what detects a rise of CO2? chemoreceptors, inform CCC 17 of 27 what does a release in adrenaline cause? stronger contractions of the heart increasing SV 18 of 27 what does noradrenaline cause? increase HR 19 of 27 what do (i) proprioceptors (ii) baroreceptors detect? (i)in muscles detect increase in activity (ii)in heart detect increase in blood pressure 20 of 27 intrinsic control during exercise? increase temp=faster nerve impulses; increase venous return so increase SV (starlings law) 21 of 27 hormonal control during exercise? adrenaline & noradrenaline stimulate SA node & increase speed&force of contractions 22 of 27 where is the CCC situated? in the medulla oblongata in the brain 23 of 27 whats the order of triggers in regulating HR? C C C S S A B P S 24 of 27 what happens when SA node is stimulated? atria contract forcing blood into ventricles 25 of 27 SA node causes the AV node to be triggered;what happens next? sends impulses down to bundle of his & purkinje fibres 26 of 27 what do the bundle of his and purkinje fibres do? force ventricles to contract pushing blood out the heart 27 of 27
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