UCLA Phlebotomy Exam 4

How big is the heart - Correct Ans-size of a mans fist how many times does the heart beat per minute? per day? - Correct Ans-60-80 per minute 100,000 per day Four chambers of the heart - Correct Ans-right atrium, right ventricle, left atrium, left ventricle The heart - Correct Ans-located in the thoracic cavity between lungs -muscular pump made of cardiac muscle fibers septum - Correct Ans-wall that separates the heart into right and left sides pericardium - Correct Ans-outer double walled sac in the heart that prevents friction allowing it to beat fast what are the three layers of the heart - Correct Ans-epicardium, myocardium, endocardium endocardium - Correct Ans-Inner layer of the heart Myocardium - Correct Ans-muscular, middle layer of the heart epicardium - Correct Ans-outer layer of the heart atria - Correct Ans-receives blood into the heart from the body -contraction pushes blood into ventricles -left and right atria separated by interatrial septum right atrium - Correct Ans-fills with deoxygenated blood from superior (arms) and inferior (feet) vena cava left atrium - Correct Ans-fills with oxygenated blood from the pulmonary vein Ventricles - Correct Ans-receives blood from atria -contraction pushes blood out of the heart -left and right ventricles separated by interventricular septum right ventricle - Correct Ans-pushes deoxygenated blood through pulmonary artery left ventricle - Correct Ans-pushes oxygenated blood through the aorta which ventricle is bigger/thicker - Correct Ans-left because it has to pump blood to the rest of the body cardiac cyle - Correct Ans-the complete sequence of events in heart from the beginning of one beat to the beginning of the following beat -includes systole and diastole cardiac output - Correct Ans-the volume of blood ejected from the left ventricle in 1 minute (approx. 5 liters) stroke volume - Correct Ans-the volume of blood pumped from the left ventricle in one beat where does the right atrium pump blood to? - Correct Ans-into the right ventricle where does the right ventricle receive blood from? - Correct Ans-right atrium where does the left atrium pump blood to? - Correct Ans-left ventricle where does the left ventricle receive blood from? - Correct Ans-left atrium How many heart valves are there? - Correct Ans-4 tricuspid, bicuspid, pulmonary semilunar, aortic semilunar tricuspid valve - Correct Ans-right atrioventricular valve -between right atrium and right ventricle Right AV valve function - Correct Ans-closes when right ventricle contracts and prevents blood from flowing back into right atrium mitral(bicuspid) valve - Correct Ans-left atrioventricular valve -between left atrium and left ventricle Left AV valve function - Correct Ans-closes when the left ventricle contracts and prevents blood from flowing back into left atrium Pulmonary semilunar valve - Correct Ans-between right ventricle and pulmonary artery -at the entrance of pulmonary artery right semilunar valve function - Correct Ans-closes when the right ventricle relaxes and prevents blood from flowing back to right ventricle aortic semilunar valve - Correct Ans-between left ventricle and aorta -at entrance of aorta left semilunar valve function - Correct Ans-closes when the left ventricle relaxes and prevents blood from flowing back into the left ventricle blood flow through heart - Correct Ans-1-Superior & Inferior Vena Cava, 2-Rt Atrium, 3-Tricuspid Valve, 4- Rt Ventricle 5-Pulmonary Valve, 6-Pulmonary Artery, 7- Lungs for oxygen/co2 exchange, 8-Pulmonary Veins, (blood is now oxygenated) 9- Lft Atrium, 10- Mitral Valve (Bicuspid), 11-Lt Ventricle, 12- Aortic Valve, 13-Aorta, 14- Body conduction system of heart - Correct Ans-SA node, AV node, Bundle of His, Purkinje fibers -ventricles contact simultaneously and force blood into lungs and body -atria and ventricles relax briefly before starting new cycle atrioventricular (AV) node - Correct Ans--simulated after SA node -impulse goes down bundle of His--> R&L bundle branches--> purkinje fibers --> ventricles sinoatrial node (SA node) - Correct Ans-pacemaker of the heart -beginning of heartbeat -causes atria to contract Purkinje fibers - Correct Ans-fibers in the ventricles that transmit impulses to the right and left ventricles, causing them to contract AV bundle (bundle of His) - Correct Ans-on top of the interventricular septum -relays impulse throughout the ventricular walls by means of bundle branches and purkinje fibers diastole - Correct Ans-relaxation phase of the cardiac cycle (anerasm) -ventricles are filling with blood from atria systole - Correct Ans-contraction phase of the cardiac cycle -ventricles contract pushing blood thru pulmonary and aortic valve to distribute blood to lungs and body heart rate - Correct Ans-controlled by autonomic nervous system -pulse is the number of times heart beats per minute usually 120/80 pulse rate - Correct Ans-occurs as a result of pressure when ventricles contract -taken by palpating radial artery on thumb side of wrist what is the normal heart rate - Correct Ans-60-80 bpm bradycardia - Correct Ans-slow heart rate (less than 60 bpm) Tachycardia - Correct Ans-fast heart rate (greater than 100 bpm) pulse sites - Correct Ans-radial brachial carotid femoral popliteal dorsalis pedis is there a pulse in veins - Correct Ans-no arteries - Correct Ans-carry blood away from the heart veins - Correct Ans-smaller and thinner than arteries -carry blood to heart -largest veins= vena cava's capillaries - Correct Ans-smallest blood vessels, unicellular -connect arteries to veins