Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 34, Problem 8TYU
DRAW IT Plot blood pressure against time for one cardiac cycle in humans, drawing separate lines for the pressure in the aorta, the left ventricle, and the right ventricle. Below the time axis, add a vertical arrow pointing to the time when you expect a peak in atrial blood pressure.
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The events of the cardiac cycle cause cyclical changes in left ventricular pressure and volume over time. Another way to represent
these events is with a pressure-volume loop, as shown below. Drag the labels from the left into the appropriate boxes on the pressure-
volume loop to demonstrate your understanding of the cardiac cycle.
Aortic valve closure
AV valve opening
Systolic pressure
Isovolumetric relaxation
Isovolumetric contraction
120
Diastolic pressure
Ventricular filling
80
End-diastolic volume
Ventricular ejection
40
AV valve closure
End-systolic volume
Aortic valve opening
60
120
LV volume (mL)
O McGraw-Hill Education
Reset
LV pressure (mm Hg)
Plot blood pressure against time for one cardiac cycle in humans, drawing separate lines for the pressure in the aorta, the left ventricle, and the right ventricle. Below the time axis, add a vertical arrow pointing to the time when you expect a peak in atrial blood pressure.
Once you have studied the wiggers diagram
Create your own outline of the steps with a brief explanation of each step.
Why each step occurs when it does; example p-wave occurs before atrial contraction becasue it is the indication that electrical current traveled through the atria to cause atrial depolorization.
You should cover all major steps from start to end of a single cardiac cycle.
number of steps you include are up to you depending on how you are looking at it, but make sure all major steps are covered
Chapter 34 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 34.1 - How is the now of hemolymph through an open...Ch. 34.1 - Three-chambered hearts with incomplete septa were...Ch. 34.1 - Prob. 3CCCh. 34.2 - Prob. 1CCCh. 34.2 - Why is it important that the AV node delay the...Ch. 34.2 - Prob. 3CCCh. 34.3 - What is the primary cause of the low velocity of...Ch. 34.3 - Prob. 2CCCh. 34.3 - Prob. 3CCCh. 34.4 - Prob. 1CC
Ch. 34.4 - Prob. 2CCCh. 34.4 - Prob. 3CCCh. 34.4 - Prob. 4CCCh. 34.5 - Why is an internal location for gas exchange...Ch. 34.5 - After a heavy rain, earthworms come to the...Ch. 34.5 - MAKE CONNECTIONS Describe similarities in the...Ch. 34.6 - Prob. 1CCCh. 34.6 - Prob. 2CCCh. 34.6 - WHAT IF? If an injury tore a small hole in the...Ch. 34.7 - What determines whether O2, or CO2, undergoes net...Ch. 34.7 - How does the Bohr shift help deliver O2, to very...Ch. 34.7 - Prob. 3CCCh. 34 - Which of the following respiratory systems is not...Ch. 34 - Blood returning to the mammalian heart in a...Ch. 34 - Pulse is a direct measure of A. blood pressure. B....Ch. 34 - Prob. 4TYUCh. 34 - One feature that amphibians and humans have in...Ch. 34 - If a molecule of CO2 released into the blood in...Ch. 34 - Prob. 7TYUCh. 34 - DRAW IT Plot blood pressure against time for one...Ch. 34 - Prob. 9TYUCh. 34 - Prob. 10TYUCh. 34 - Prob. 11TYUCh. 34 - SYNTHESIZE YOUR KNOWLEDGE The diving bell spider...
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- A 43-year-old woman has congestive heart failure after a myocardial infarction. Before the myocardial infarction, she had a cardiac output of 5 L/min and a right atrial pressure of 0 mm Hg at rest. The solid curve in the graph shows the relationship between right atrial pressure and cardiac output in a normal heart. Which of the following lettered points best represents the change in this relationship after the development of congestive heart failure?arrow_forwardBlood is pushed out of the heart through a large vessel, called the aorta. The aorta then divides into smaller and smaller blood vessels, eventually reaching vessels called capillaries. Capillaries are so small that oxygen and nutrients can diffuse across the vessel walls and into the tissues of the body, with CO2 and waste diffusing back into the blood. Let's say that the cross-sectional area of the aorta is 1 cm2 = 100 mm2. The blood pumps through the aorta at 100 mm/s but only through the capillaries at 1 mm/s. If each capillary has a cross-sectional area of 20 mm2, how many capillaries must there be in the body? Note: these numbers are not physiologically correct, but were chosen to make the math easier. The blood velocity through the aorta is closer to 300 mm/s. The capillaries have a total cross-sectional area of ~600,000 mm2 (6000 cm2), with a blood flow rate closer to 0.2 mm/s.arrow_forwardWhen the heart's electrical system misfires, it's called atrial [term]. The heart starts generating electrical impulses in more than one place, not just in the SA node.arrow_forward
- In a patient with a ventricular septal defect, blood is ejected from the left ventricle into the right ventricle during isovolumic contraction phase of the cardiac cycle. Which pressure volume loop from the left ventricle is most likely from a patient with a ventricular septal defect? The dashed line is a normal loop for reference in all figures. A 120 B 120 C 120- D 120- 75 50- 25 50 100 Left Ventricular Vol (mL) 75- 50 25 75+ 50+ 25+ 150 50 100 150 50 100 150 Left Ventricular Vol (mL) Left Ventricular Vol (mL) 75+ 50+ 25+ 50 100 150 Left Ventricular Vol (mL) -000arrow_forwardI need to calculate the approximate heart rate based on the given ECG results, but I can't get how to determine the length of time between two consecutive R waves. What I see, it's one second between the two highest waves (I suppose they are R waves). But it means the heart rate should be 60 beats per minute, but there is no option for this answer. Teach me how to determine correctly the length of time between two consecutive R waves.arrow_forwardF D H Let's review the electrical events that occur during a heartbeat. Match each phase of the ECG in the figure with its description. ▸ View Available Hint(s) Rearrow_forward
- which of the following is true for the ejection phase of the cardiac cycle select all that apply ventricular volume decreases ventricular pressure increases ventricular volume increases av valves openarrow_forwardUpload a drawing that shows the path of blood as a single circuit (like a loop) from the left ventricle back to the left ventricle. In your drawing you should "split" the heart into separate pumps. Include the atria, arteries, and tissues in your drawing.arrow_forwardwhat does the formation of the strip ventricular canal from the first heart field look like ? Give typing answer with explanation and conclusionarrow_forward
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