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Higher Human 2.6

2.6- Structure and Function of the Heart

QuestionAnswer
Which of the following is a typical blood pressure reading for a young adult? 120/80mmHg
What is high blood pressure known as? Hypertension
What is used to measure blood pressure? Sphygmomanometer
When during the cardiac conducting cycle does blood pressure decrease? Diastole
When during the cardiac conducting cycle does blood pressure increase? ventricular systole
What part of the brain regulates the rate of the SAN? Medulla
What neurotransmitter does the parasympathetic nervous system release to decrease the heart rate? Acetylcholine
What neurotransmitter does the sympathetic nervous system release to increase the heart rate? Noradrenaline
What can Impulses in the heart generate currents that can be detected by ? Electrocardiogram (ECG)
Where is the AVN located? Centre of the heart
Where is the SAN located? Wall of the Right atrium
What is correct for the valves in the heart during ventricular systole? AV closed SL open
What term is used to describe the contraction of the ventricle walls? Ventricular systole
What is correct for the valves in the heart during atrial systole? AV open SL closed
what term is used to describe the contracting of the walls of the atria? atrial systole
What is correct for the valves in the heart during diastole? AV open SL closed
What word is used to describe when the hear muscles are relaxed? Diastole
How would you compare the volume of blood pumped out of the aorta with the volume pumped out of the pulmonary artery? It is the same
How do you calculate cardiac output? CO= ? CO= HR x SV Cardiac Output= Heart Rate x Stroke Volume
Other than heart rate, what else effects cardiac output? Stroke Volume
what is the volume of blood pumped through each ventricle per minute known as? Cardiac Output
Created by: mackas89
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