Statistics for Heart anatomy and physiology

Click here to take the quiz!

General Stats
Answer Stats
Score Distribution
Your Score History

General Stats

This quiz has been taken 56 times
(53 since last reset)
The average score is 15 of 44

Answer Stats

Question	Answer	% Correct
What is the name of the heart muscle?	Myocardium	84%
What 2 values do you multiply to work out the Cardiac output?	Heart rate and stroke volume	71%
What is the average heart stroke volume?	70ml	63%
What is the name of the tissue which lines heart chambers?	Endocardium	61%
What is the approximate length and mass of a human heart?	15cm/300g	58%
Which Valve is between the Left Ventricle and Aorta?	Aortic	58%
Which side of the heart has a thicker muscle wall?	Left Ventricle	58%
Which valve is between the Right Ventricle and Pulmonary Trunk?	Pulmonary/Pulmonic	58%
Which valve is between the Right Atria and Right Ventricle?	Tricuspid	58%
What does the cardiac reserve represent?	The difference between resting and maximum cardiac output	53%
Which valve is between the Left Atria and Left Ventricle?	Bicuspid/Mitral	47%
What is the outer layer of heart tissue called, which protects the heart?	Pericardium	47%
What does bradycardia mean?	decreased heart rate	45%
What does tachycardia mean?	increased heart rate	45%
Which muscles are the heart valves connected to, and in what phase do they contract?	Papillary, Systole	42%
The release of what ion triggers contraction of cardiac muscle?	Calcium	37%
What is the sound S1?	Closing of AV valves at the start of ventricular systole	34%
What is the Frank Starling mechanism?	The more the ventricle is filled with blood during diastole, the greater the stroke volume	34%
What proteins prevent the interaction of actin and myosin?	Troponin and Tropomyosin	34%
What is the source of the trigger calcium?	Extracellular space through L type channels	32%
What does chronotropy mean?	contraction frequency	29%
Where is the heart within the Thorax?	In the centre	29%
What happens to the calcium in the cell after this?	It is reabsorbed into the SR and then removed from the cell	29%
What do actin and myosin do in cardiac muscle?	Slide past each other	29%
What is the sound S2?	Closing of semilunar valves at the end of ventricular systole	26%
What triggers release in the sliding filament mechanism?	ATP Binding	24%
What triggers calcium release from the sarcoplasmic reticulum after trigger calcium is received from another source?	Ryanodine Receptors	24%
What happens as the concentration of calcium decreases?	It dissociates with the site it originally bound to	21%
What does inotropy mean?	strength of contraction	21%
What is the preload?	Stretch of cardiac muscle during diastole	21%
What causes power stroke in the sliding filament mechanism?	ADP Dissociation	18%
What causes conformational change in the sliding filament mechanism?	ATP Hydrolysis	18%
Which ion binds to the above proteins causing conformational change and the interaction of actin and myosin?	Calcium	18%
Which of the 7 heart phases are systole?	First 4	18%
What causes rebinding in the sliding filament mechanism?	Phosphate dissociation	18%
What does bathmotropy mean?	myocardial excitability	16%
What does lusitropy mean?	myocardial relaxation	16%
What is a baroreceptor?	Nerve endings in the adventitia of the carotid sinus and aortic arch	16%
What is afterload	Tension produced by the heart to eject blood	16%
What does the calcium interact with, what does it cause, and what does it uncover?	TN-C, TN-I, Myosin binding site on actin	16%
Which method asides from the Ca pump is calcium removed from cells?	Na/Ca exchanger	13%
Which 3 pumps are used to regulate concentration of ions?	Na/Ca, Na/K, ATPase/Ca	13%
What regulates electrical activity in the heart?	Concentration change	11%
What is the Nernst potential?	Voltage required to stop flow of ions to due concentration gradient	11%