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A heart beats 72 times per minute with a total of 10mL of blood pumped with each contraction. What is the cardiac output of the given heart?
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- Lucy is resting before her workout. Her heart is beating times 70 times per minute, and with each heartbeat, her ventricles are pumping 65 mL of blood. Calculate Lucy’s Cardiac Output.Does the human heart spend more time in diastole or more time in systole (assume a heart rate of 72 beats per minute)? Of what benefit is this?Calculate heart rate (BPM) with dimensional analysis. Heart is beating ever 1.13 seconds what would be the calculated heart rate per minute?
- The aorta is the principal blood vessel through which blood leaves the heart in order to circulate around the body. (a) Calculate the average speed of the blood in the aorta if the flow rate is 5.0 L/min. The aorta has a radius of 10 mm. (b) Blood also flows through smaller blood vessels known as capillaries. When the rate of blood flow in the aorta is 5.0 L/min, the speed of blood in the capillaries is about 0.33 mm/s. Given that the average diameter of a capillary is 8.0 μm (1 μm = 1 X 10 –6 m), calculate the number of capillaries in the blood circulatory system.Define cardiac output in words and with a simple mathematical formula.What is Preload and Afterload in the cardiac output of a human heart?
- What is the cardiac output of a person with a resting stroke volume of 60 mL and a heartbeat of 80 bpm. (BONUS: Is the calculated cardiac output normal or abnormal?)Estimate the volume of a human heart (in mL) using the following measurements/assumptions: Blood flow through the aorta is approximately 16.8 cm/s. The diameter of the aorta is approximately 3.0 cm. Assume the heart pumps its own volume with each beat. Assume a pulse rate of 90 beats per minute.We analyzed the difference between the action potential of a cardiac contractile cell and an action potential in a neuron. Describe the physiological mechanisms behind the primary difference in the shape of these two action potentials. Why is this feature important to the normal workings of the heart?
- A) The term used to describe one complete heartbeat, or the time for both contraction and relaxation of the heart muscle is the _____________________. B) The term _____?_________ refers to ventricular contraction, while the term ______?________ refers to ventricular relaxation. C) f a patient has a heart rate of 75 beats per minute, then what is the average length of time that each of the following parts of that cycle lasts? (time in secs) -atrial contraction: ____________________ -atrial relaxation: ____________________ -ventricular contraction ____________________ -quiescent period: _____________________ -1 entire cycle: _____________________ D) When you listen to (auscultate) heart sounds, what you are hearing are the sounds of valves _______?______________. E.) A heart murmur indicates some kind of valve ________?____________.Describe the electrical event in the heart that occurs during each of the following: (a) the QRS wave of the ECG; (b) the T wave of the ECG; (c) the P-R interval of the ECG.Heart rate FIRST 10 sec post-exercise: 130 bpm Heart rate LAST 10 sec post-exercise: 97 bpm How are the heart rates different? How would you expect this to change the appearance of your ECG graph?
