Definition | Keyword | % Correct |
---|---|---|
When the heart contracts | Systole | 66%
|
'Powerhouse' of the cell where energy production occurs | Mitochondria | 64%
|
A stress hormone that is release by the sympathetic nerves and cardiac nerve during exercise which causes an increase in heart rate | Adrenaline | 62%
|
A small mass of cardiac muscle found in the wall of the right atrium that generates the heartbeat | Sinoatrial Node | 62%
|
Part of the autonomic nervous system that speeds up heart rate | Sympathetic | 61%
|
An iron-containing pigment found in red blood cells, which combines with oxygen to form oxyhaemoglobin | Haemoglobin | 57%
|
Part of the autonomic nervous system that decreases heart rate | Parasympathetic | 57%
|
The widening of the blood vessels to increase the flow of blood into the capillaries | Vasodilation | 57%
|
This node relays the impulse between the upper and lower sections of the heart | Atrioventricular Node | 56%
|
The capacity of the heart to generate its own impulses | Myogenic | 56%
|
The fluid part of blood that surrounds blood cells and transports them | Plasma | 56%
|
The narrowing of the blood vessels to reduce blood flow into the capillaries | Vasoconstriction | 56%
|
A collection of heart muscle cells that transmit electrical impulses from the AVN via the bundle branches to the ventricles | Bundle of His | 54%
|
A measure of acidity | pH | 52%
|
Occurs when the blood supply to the brain is cut off | Stroke | 52%
|
The volume of blood pumped out by the hearts ventricles in each contraction | Stroke volume | 52%
|
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 | 51%
|
Muscle fibres that conduct impulses in the walls of the ventricles | Purkinje fibres | 51%
|
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 | 49%
|
The volume of blood pumped out by the heart ventricles per minute | Cardiac output | 48%
|
A decrease in resting heart rate to below 60 beats per minute | Bradycardia | 46%
|
The most important part of the brain as it regulates processes that keep us alive such as breathing and heart rate | Medulla oblongata | 46%
|
The force exerted by the blood against the blood vessel wall | Blood pressure | 41%
|
The return of blood to the right side of the heart via the vena cava | Venous return | 39%
|
Chest pain that occurs when the blood supply through the coronary arteries to the muscles of the heart is restricted | Angina | 34%
|
Occurs when arteries harden and narrow as they become clogged up by fatty deposits | Atherosclerosis | 34%
|
The thickening of the muscular wall of the heart so it becomes bigger and stronger; also can mean a larger ventricular cavity | Cardiac hypertrophy | 34%
|
Sensory nerve endings in the muscles, tendons and joints that detect changes in muscle movement | Proprioceptors | 34%
|
An iron-containing muscle pigment in slow-twitch muscles which has a higher affinity for oxygen than haemoglobin | Myoglobin | 33%
|
When an increase in blood carbon dioxide and a decrease in pH results in a reduction of the affinity haemoglobin for oxygen | Bohr shift | 28%
|
The pressure in the arteries when the ventricles are relaxing | Diastolic pressure | 23%
|
The pressure in the arteries when the ventricles are contracting | Systolic pressure | 23%
|
The percentage of blood pumped out by the left ventricle per beat | Ejection fraction | 21%
|
A fatty deposit found in the inner lining of an artery | Atheroma | 13%
|
The redistribution of cardiac output | Vascular shunt mechanism | 13%
|
Where the athlete is able to meet the oxygen demand with the oxygen supply | Steady state | 8%
|
The difference between the oxygen content of the arterial blood arriving at the muscles and the venous blood leaving the muscles | Arterio-venous difference | 7%
|
When the heart relaxes to fill with blood | Diastole phase | 3%
|
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