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Heart anatomy and physiology - Statistics
General Stats
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This quiz has been taken 195 times
192 since last reset
- The average score is 14 of 44
Answer Stats
| Question | Answer | % Correct |
|---|---|---|
| What is the name of the heart muscle? | Myocardium | 74%
|
| What 2 values do you multiply to work out the Cardiac output? | Heart rate and stroke volume | 69%
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| Which Valve is between the Left Ventricle and Aorta? | Aortic | 63%
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| Which side of the heart has a thicker muscle wall? | Left Ventricle | 63%
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| Which valve is between the Right Ventricle and Pulmonary Trunk? | Pulmonary/Pulmonic | 63%
|
| What is the average heart stroke volume? | 70ml | 61%
|
| Which valve is between the Right Atria and Right Ventricle? | Tricuspid | 60%
|
| What is the outer layer of heart tissue called, which protects the heart? | Pericardium | 59%
|
| What is the approximate length and mass of a human heart? | 15cm/300g | 55%
|
| Which valve is between the Left Atria and Left Ventricle? | Bicuspid/Mitral | 54%
|
| What is the name of the tissue which lines heart chambers? | Endocardium | 54%
|
| What does tachycardia mean? | increased heart rate | 41%
|
| What proteins prevent the interaction of actin and myosin? | Troponin and Tropomyosin | 41%
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| What is the sound S2? | Closing of semilunar valves at the end of ventricular systole | 40%
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| What does bradycardia mean? | decreased heart rate | 38%
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| What is the sound S1? | Closing of AV valves at the start of ventricular systole | 34%
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| Which muscles are the heart valves connected to, and in what phase do they contract? | Papillary, Systole | 32%
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| What triggers release in the sliding filament mechanism? | ATP Binding | 30%
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| The release of what ion triggers contraction of cardiac muscle? | Calcium | 29%
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| What do actin and myosin do in cardiac muscle? | Slide past each other | 29%
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| What does the cardiac reserve represent? | The difference between resting and maximum cardiac output | 26%
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| Which ion binds to the above proteins causing conformational change and the interaction of actin and myosin? | Calcium | 25%
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| Where is the heart within the Thorax? | In the centre | 24%
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| What happens to the calcium in the cell after this? | It is reabsorbed into the SR and then removed from the cell | 23%
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| What is the Frank Starling mechanism? | The more the ventricle is filled with blood during diastole, the greater the stroke volume | 23%
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| What is the source of the trigger calcium? | Extracellular space through L type channels | 22%
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| What does inotropy mean? | strength of contraction | 21%
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| What triggers calcium release from the sarcoplasmic reticulum after trigger calcium is received from another source? | Ryanodine Receptors | 20%
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| What does chronotropy mean? | contraction frequency | 18%
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| What causes conformational change in the sliding filament mechanism? | ATP Hydrolysis | 17%
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| What causes rebinding in the sliding filament mechanism? | Phosphate dissociation | 16%
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| Which 3 pumps are used to regulate concentration of ions? | Na/Ca, Na/K, ATPase/Ca | 15%
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| What is the preload? | Stretch of cardiac muscle during diastole | 15%
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| What causes power stroke in the sliding filament mechanism? | ADP Dissociation | 14%
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| Which of the 7 heart phases are systole? | First 4 | 14%
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| Which method asides from the Ca pump is calcium removed from cells? | Na/Ca exchanger | 14%
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| What is afterload | Tension produced by the heart to eject blood | 14%
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| What is the Nernst potential? | Voltage required to stop flow of ions to due concentration gradient | 14%
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| What happens as the concentration of calcium decreases? | It dissociates with the site it originally bound to | 13%
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| What does bathmotropy mean? | myocardial excitability | 13%
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| What is a baroreceptor? | Nerve endings in the adventitia of the carotid sinus and aortic arch | 13%
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| What does lusitropy mean? | myocardial relaxation | 11%
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| What does the calcium interact with, what does it cause, and what does it uncover? | TN-C, TN-I, Myosin binding site on actin | 10%
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| What regulates electrical activity in the heart? | Concentration change | 5%
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