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 23RQ
Of the three germ layers that give rise to all adult tissues and organs, which gives rise to the heart?
- ectoderm
- endoderm
- mesoderm
- placenta
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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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- Which one of the following statements is incorrect? There are no valves in arteries. the walls of veins are thin. the walls of capillaries are thick. veins carry blood into the heart.arrow_forwardWhich part of the heart is responsible for the muscular contractions that pump blood through it? myocardium endocardium valves pericardiumarrow_forwardThe heart has three layers the outermost of which is called the ___arrow_forward
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- The foramen ovale and ductus arteriosus are found in the fetal heart but not the normal adult heart. What do these structures do? they allow most of the blood coming in to the right atrium to avoid the lungs they control blood pressure they allow blood in the lungs to stay there longer than with an adult, to fully oxygenate every cell they allow blood to bypass the aorta and go directly to the portal system as it enters the liverarrow_forwardThe pace maker cells of the heart are made of? leukocytes facia myocardial cells epithelial cellsarrow_forwardThe left and right sides of the heart are separated by a structure called the ___ .arrow_forward
- The foramen ovale functions to: Group of answer choices permit blood to bypass the nonfunctional lungs in a fetus. establish the basic heart rate. prevent blood from flowing backward. carry blood to the lungs in a fetus. transport poorly oxygenated blood.arrow_forwardThe upper chambers of the heart are the: A) capillariesB) atriumsC) aortasD) ventriclesarrow_forwardFill in the blanks: The first heart sound is called __________and it is caused by the closing of the __________ valves. It occurs at the beginning of the __________ phase of the cardiac cycle. The second heart sound is called __________ and it is caused by the closing of the __________ valves. It occurs at the beginning of the __________ phase of the cardiac cyclearrow_forward
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