The heart 0.0 / 5 ? Applied Sciencethe heart ASAQA Created by: paigeburloCreated on: 01-05-17 12:21 what do valves do? prevent the back flow of blood 1 of 23 what do arteries do? carry blood away from the heart 2 of 23 what do veins do? carry blood to the heart 3 of 23 why do veins have pocket valves? to prevent the back flow of blood 4 of 23 what does myogenic mean? it generates its own electrical impulses 5 of 23 what do barroreceptors detect? detects change in pressure 6 of 23 what do chemoreceptors detect? detects change in pH of the blood 7 of 23 what does the sympathetic nerve do? speeds up the heart rate and increases the stroke volume 8 of 23 what does the parasympathetic nerve do? causes the heart rate to fall and the stroke volume to decrease 9 of 23 what does the medulla do? receives messages from receptors in the body and sends impulses down the nerves to the heart 10 of 23 during exercise, what does the sympathetic nerve do? sends an impulse to the arterioles surrounding the muscles causing them to vasodilate, this increases blood flow to the muscles 11 of 23 what is the average blood pressure for an 18 year old? 120/80 mmHg 12 of 23 what is the average blood pressure for an 20 year old male? 125/ 80 mmHg 13 of 23 what is the average blood pressure for an 20 year old female? 123/80 mmHg 14 of 23 what is the average blood pressure for an 40 year old male? 135/ 85 mmHg 15 of 23 what is the average blood pressure for an 40 year old female? 133/ 85 mmHg 16 of 23 what is bradycardia? unusually slow heart rate,low BMP 17 of 23 what is arrhythmia? uneven heart rate, different times between PQRST waves? 18 of 23 what is ventricular fibrillation? no regular rhythm, leads to heart attack 19 of 23 what is tachycardia? usually fast heart rate, higher BPM? 20 of 23 what does the P and for in the PQRST wave? impulses spreading across the atria- causing atria systole 21 of 23 what does the QRS and for in the PQRST wave? electrical impulses across the ventral- causing ventricular systole 22 of 23 what does the T and for in the PQRST wave? wave occurs as the ventricles recover 23 of 23
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