A Level PE - The Cardiovascular System - Statistics

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This quiz has been taken 122 times
The average score is 16 of 38

Answer Stats

Definition	Keyword	% Correct
'Powerhouse' of the cell where energy production occurs	Mitochondria	64%
When the heart contracts	Systole	61%
A small mass of cardiac muscle found in the wall of the right atrium that generates the heartbeat	Sinoatrial Node	60%
A stress hormone that is release by the sympathetic nerves and cardiac nerve during exercise which causes an increase in heart rate	Adrenaline	58%
Part of the autonomic nervous system that speeds up heart rate	Sympathetic	58%
The widening of the blood vessels to increase the flow of blood into the capillaries	Vasodilation	58%
A collection of heart muscle cells that transmit electrical impulses from the AVN via the bundle branches to the ventricles	Bundle of His	57%
An iron-containing pigment found in red blood cells, which combines with oxygen to form oxyhaemoglobin	Haemoglobin	57%
The fluid part of blood that surrounds blood cells and transports them	Plasma	57%
The narrowing of the blood vessels to reduce blood flow into the capillaries	Vasoconstriction	57%
This node relays the impulse between the upper and lower sections of the heart	Atrioventricular Node	55%
Part of the autonomic nervous system that decreases heart rate	Parasympathetic	55%
A measure of acidity	pH	54%
Occurs when the blood supply to the brain is cut off	Stroke	54%
Muscle fibres that conduct impulses in the walls of the ventricles	Purkinje fibres	52%
The volume of blood pumped out by the hearts ventricles in each contraction	Stroke volume	52%
The capacity of the heart to generate its own impulses	Myogenic	51%
Special sensors in tissues in the aortic arch, carotid sinus, heart and pulmonary vessels that respond to changes in blood pressure to either increase or drecrease heart rate	Baroreceptors	49%
The volume of blood pumped out by the heart ventricles per minute	Cardiac output	48%
Tiny structures in the carotid arteries and aortic arch that detect changes in blood acidity caused by an increase/decrease in the concentration of carbon dioxide	Chemoreceptors	48%
A decrease in resting heart rate to below 60 beats per minute	Bradycardia	43%
The most important part of the brain as it regulates processes that keep us alive such as breathing and heart rate	Medulla oblongata	43%
The force exerted by the blood against the blood vessel wall	Blood pressure	42%
The return of blood to the right side of the heart via the vena cava	Venous return	39%
Occurs when arteries harden and narrow as they become clogged up by fatty deposits	Atherosclerosis	34%
Chest pain that occurs when the blood supply through the coronary arteries to the muscles of the heart is restricted	Angina	33%
The thickening of the muscular wall of the heart so it becomes bigger and stronger; also can mean a larger ventricular cavity	Cardiac hypertrophy	33%
Sensory nerve endings in the muscles, tendons and joints that detect changes in muscle movement	Proprioceptors	33%
An iron-containing muscle pigment in slow-twitch muscles which has a higher affinity for oxygen than haemoglobin	Myoglobin	31%
When an increase in blood carbon dioxide and a decrease in pH results in a reduction of the affinity haemoglobin for oxygen	Bohr shift	27%
The pressure in the arteries when the ventricles are relaxing	Diastolic pressure	21%
The pressure in the arteries when the ventricles are contracting	Systolic pressure	21%
The percentage of blood pumped out by the left ventricle per beat	Ejection fraction	19%
A fatty deposit found in the inner lining of an artery	Atheroma	12%
The redistribution of cardiac output	Vascular shunt mechanism	12%
Where the athlete is able to meet the oxygen demand with the oxygen supply	Steady state	9%
The difference between the oxygen content of the arterial blood arriving at the muscles and the venous blood leaving the muscles	Arterio-venous difference	6%
When the heart relaxes to fill with blood	Diastole phase	3%

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