Anatomy & Physiology
1st Edition
ISBN: 9781938168130
Author: Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher: OpenStax College
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Textbook Question
Chapter 19, Problem 14RQ
Most blood enters the ventricle during ________.
- atrial systole
- atrial diastole
- ventricular systole
- isovolumic contraction
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Pressure in the ventricle would be lowest during _____.
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ventricular systole
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isovolumetric relaxation
diastisis
The aortic semilunar valve has ____ pocket-like flaps of tissue.
The blood pressure in the left ventricle during systole is ______ the blood pressure in the right ventricle.
A
greater than
B
equal to
C
less than
Chapter 19 Solutions
Anatomy & Physiology
Ch. 19 - Visit this site...Ch. 19 - Which of the following is not important in...Ch. 19 - Which valve separates the left atrium from the...Ch. 19 - Which of the following lists the valves in the...Ch. 19 - Which chamber initially receives blood from the...Ch. 19 - The ________ layer secretes chemicals that help to...Ch. 19 - The myocardium would be the thickest in the...Ch. 19 - In which septum is it normal to find openings in...Ch. 19 - Which of the following is unique to cardiac muscle...Ch. 19 - The influx of which ion accounts for the plateau...
Ch. 19 - Which portion of the ECG corresponds to...Ch. 19 - Which component of the heart conduction system...Ch. 19 - The cardiac cycle consists of a distinct...Ch. 19 - Most blood enters the ventricle during ________....Ch. 19 - The first heart sound represents which portion of...Ch. 19 - Ventricular relaxation immediately follows...Ch. 19 - The force the heart must overcome to pump blood is...Ch. 19 - The cardiovascular centers are located in which...Ch. 19 - In a healthy young adult, what happens to cardiac...Ch. 19 - What happens to preload when there is venous...Ch. 19 - Which of the following is a positive inotrope? Na+...Ch. 19 - The earliest organ to form and begin function...Ch. 19 - Of the three germ layers that give rise to all...Ch. 19 - The two tubes that eventually fuse to form the...Ch. 19 - Which primitive area of the heart will give rise...Ch. 19 - The pulmonary trunk and aorta are derived from...Ch. 19 - Describe how the valves keep the blood moving in...Ch. 19 - Why is the pressure in the pulmonary circulation...Ch. 19 - Why is the plateau phase so critical to cardiac...Ch. 19 - How does the delay of the impulse at the...Ch. 19 - How do gap junctions and intercalated disks aid...Ch. 19 - Why do the cardiac muscles cells demonstrate...Ch. 19 - Describe one cardiac cycle, beginning with both...Ch. 19 - Why does increasing EDV increase contractility?Ch. 19 - Why is afterload important to cardiac function?Ch. 19 - Why is it so important for the human heart to...Ch. 19 - Describe how the major pumping chambers, the...
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- 4. Atrial systole follows _________. T-wave Z-wave P-wave QRS complexarrow_forwardWhen the ventricles are no longer acting as a syncytium and can't pump blood, they are in ____. Group of answer choices ventricular tachycardia fibrillation bradycardia AV node blockarrow_forwardRepolarization of ventricular myocardiocytes is caused by ______ the cells through voltage-gated channels. A potassium entering B potassium leaving C sodium entering D sodium leaving E calcium enteringarrow_forward
- In the sheep's heart, the right atrium is _______ to the right ventricle.arrow_forwardWhen the lumen of an artery fills with plaque and calcium salts reducing blood flow, this condition is called ___. atherosclerosis arteriosclerosis mycosis myosisarrow_forwardWhen heart muscle is suddenly starved of blood so that it dies, this is called ___. fusiform aneurysm angina pectoris saccular aneurysm acute myocardial infarctionarrow_forward
- During diastole the blood pressure in the left ventricle is _______. A lower than the pressure in the left atrium so the ventricle can fill B greater than the pressure in the aorta so blood can be ejected C equal to the diastolic blood pressure measured in the armarrow_forwardWhen a portion of the myocardium is suddenly deprived of oxygen and heart tissue dies, this is called___. mitral stenosis angina pectoris acute myocardial infarction congestive heart failiurearrow_forwardThe atrioventricular valves open because ______. A relaxation of the ventricles causes the ventricular pressure to fall below the atrial pressure B ventricular pressure rises above the pressure in the aorta and pulmonary arteries C ventricular pressure rises above atrial pressure due the ventricular walls being stronger D atrial contraction causes atrial pressure to rise above ventricular pressurearrow_forward
- The type(s) of vessels which could develop an aneurysm is (are) ___. arteries only veins only veins and arteries veins and capillariesarrow_forwardThe first heart sound is heard as the ECG records the end of the ______. A P wave B T-P interval C QRS wave D T wave E S-T segmentarrow_forwardIn the case where a single valve unit in a vein fails so the weight of the blood is held up by the next lower vein is called a(n)___. varix hemorrhage aneurysm AMIarrow_forward
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