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45 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Contracts on its own |
Myogenic |
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Tissue in atrium that releases wave of depolarisation |
SAN |
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Tissue near AV border in atrium |
AVN |
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Centre of heart |
Septum |
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Tissue running down centre of heart |
Bundle of His |
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Tissues going through ventricle walls |
Purkyne Fibres |
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Wave of energy released by nodes |
Wave of depolarisation |
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Property of tissue between atrium and ventricles |
Non-conductive |
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Place the ventricles contact first |
Apex |
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Part of brain that controls heart rate |
Medulla oblongata |
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Nervous system that doesn't require thought |
Autonomic |
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Way to increase heart rate |
Sympathetic nervous system |
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Way to decrease heart rate |
Parasympathetic nervous system |
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Why does pressure change heart rate? |
Too low = not enough O2 to tissues, too high = too much pressure on arteries causes damage |
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Why does pH cause heart rate to change? |
Removal of CO2 and lactic acid |
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Receptor to detect pH |
Chemoreceptors |
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Receptor to detect pressure |
Baroreceptors |
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Where are pH and pressure receptors located? |
Aorta and carotid artery |
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What is the carotid artery |
Artery branching off from aorta |
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Word for: the more oxygen binding, the higher the affinity |
Positive cooperativity |
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Why is the last oxygen the hardest to bind? |
Less oxygen availability |
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Why is the never 100% saturation of oxygen? |
The last one is hard to bind because of a lower probability of collisions due to less o2 |
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What is Bohr Shift? |
The more CO2, the more the oxygen dissociation curve will shift to the right (because lower affinity for O2 so less bind to Hb) |
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What are the names for contraction and relaxation of the heart chambers? |
Systole and Diastole |
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How does blood move around the body? |
Pressure gradients |
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What waves are in an electrocardiagram? |
P, QRS and T |
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Heart attack |
Myocardial infarction |
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What are valves made of |
Tough fibrous tissue, cusp shaped |
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What type of valves are in veins |
Pocket valves |
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What are the two types of circulation |
Pulmonary and systematic |
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Differences between blood, tissue fluid and lymph |
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RBC, WBC, O2 conc, CO2 conc, glucose conc, pressure |
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Three artery components |
Lumen, tunica media, adventitia and intima |
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Tunica adventitia components and purpose |
Collagen - prevent from over stretching |
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Tunica media components and purpose |
Elastic fibres to stretch and recoil under different pressures and smooth muscle to contract and divert blood vasoconstriction/dilation |
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Tunica intima components and purpose |
Folded endothelium to allow stretching |
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Why low pressure in veins? |
RBC moved slowly in capillaries, gravity and distance from heart |
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Capillary features |
Lumen one RBC wide, endothelium one cell thick and pores for small molecules |
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Vein connecting liver and intestine + purpose |
Hepatic portal vein - transports absorbed food molecules in deoxygenated blood |
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Blood vessels connecting artery and capillary + capillary and vein |
Arteriole and Venule |
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Circulatory system in fish |
Closed single |
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Name for blood + cavity in insects |
Hemolymph and hemocoel |
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Type of heart in insects |
Tubular |
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Vessel connecting hemocoel and heart in insects |
Ostia |
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How does blood get to organs in insects |
Organs bathed in hamolymph |
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Differences between arteries and veins |
Arteries = no valves, folded endothelium, thicker tunica adventitia and media |
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