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 10RQ
The influx of which ion accounts for the plateau phase?
- sodium
- potassium
- chloride
- calcium
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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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Similar questions
- Explain how the capacity (function) of the sodium potassium pumps found in the ascending loop of Henle enable the establishment of the medullary concentration gradient.arrow_forwardAn action potential causes depolarization of the T tubule membranearrow_forwardDuring a heavy physical workout, will the body need to reabsorb ions or not and explain whyarrow_forward
- What are the consequences of prolonged elevation ofblood phosphate ions?arrow_forwardA young woman who has suffered a head injury seems to have recovered but is thirsty all the time. What do you think might be the cause? Hint: remember the main stimulus to vasopressin and thirst.arrow_forwardDiagram/flow chart the reactions and interactions of the renin-angiotensin-aldosterone pathway. What conditiion is the primary stimulus for its activation? What would hapen to renin secretion in a patient with chronic kidney failure?arrow_forward
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- there is a known cause of high blood pressure that occurs because of a reduced fluid flow that triggers RAAS and Na+ reaborption with increased blood volume and pressure. what is it?arrow_forwardIf the other three forces that determine fluid movement were unchanged, an increase in blood hydrostatic pressure would cause edema.arrow_forwardA person is taking a drug that inhibits the tubular secretion of H1. What effect does this drug have on the body’s balance of sodium, water, and H1? Hint: Remember that Na1 reabsorption by the proximal tubule is achieved by Na1/H1 countertransport.arrow_forward
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