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 18RQ
The cardiovascular centers are located in which area of the brain?
- medulla oblongata
- pons
- mesencephalon (midbrain)
- cerebrum
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Students have asked these similar questions
Why is resting heart rate somewhat slower than the 80–100 bpm set by the SA node?
The AV bundle branches slow the heart rate down.
Sympathetic fibers release norepinephrine to slow heart rate.
The AV node slows the heart to an average between its own rate and that of the SA node.
Parasympathetic effects dominate in a resting individual
A class of drugs called beta-blockers are commonly
prescribed to cardiac patients in order to reduce their heart
rate. Beta-blockers slow heart rate by reducing the
conduction of action potentials through the A-V
(atrioventricular) node. The most likely effect on an ECG
shorter R-R interval
shorter Q-T interval
longer P-R interval
longer T wave
Which of these will increase the heart rate?
sympathetic stimulation of SA node
parasympathetic stimulation to the SA node
the application of adrenalin (epinephrine) to the SA node
O A and C
O All of the above
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Clusters of neurons in the medulla oblongata that regulate blood pressure are known collectively as ________. baroreceptors angioreceptors the cardiomotor mechanism the cardiovascular centerarrow_forwardWhich heart chamber has the thickest wall? a. right atrium c. left atrium b. right ventricle d. left ventriclearrow_forwardWhen the SA node fails, the AV node establishes a new intrinsic heart rate. This will result in Increased parasympathetic output to the SA node Increased blood pressure Increased blood flow through the pulmonary circulation Decreased cardiac output As Decreased sympathetic output to the SA node 20arrow_forward
- 40- In the brain the frontal lobe has Oa. Voluntary motor activity Ob. Speaking Oc. Reasoning Od. Problem solving Oe. All of the abovearrow_forwardA lower mean arterial pressure (MAP) would cause which of the following? Choose all that apply. Activation of the parasympathetic system Activation of the sympathetic system Vasoconstriction of the veins Lower cardiac output Decrease in action potentials from arterial baroreceptorsarrow_forwardBlood that leaves the right ventricle is _________ and travels along the _______ to the _______. oxygenated ; systemic vein ; tissues of the body that need oxygen deoxygenated ; pulmonary vein ; lungs oxygenated ; systemic artery ; tissues of the body that need oxygen deoxygenated ; pulmonary artery ; lungsarrow_forward
- Which structure is responsible for sending the electrical excitation from the atria towards the ventricles. Left bundle branch Sinoatrial node Right bundle branch Atrioventricular node Purkinje fibersarrow_forwardWhich of the following structures of the heart is responsible for pumping the blood to the lungs? left atrium left ventricle right atrium right ventricle sinoatrial nodearrow_forwardWhat keeps the atrioventricular (AV) valves from being pushed open as the ventricles contract? Pressure of blood pushing against the valves. Contraction of the atria. Closure of the semilunar valves. Contraction of papillary muscles and tightening of chordae tendineae.arrow_forward
- A person showing signs and symptoms of a heart attack will often: Panic and faint Deny that they are having a heart attack Take a nap to relieve pain None of the abovearrow_forwardWhich of the following situations might indicate the need for an artificial pacemaker? Group of answer choices The AV node is not sending signals to the ventricles. The SA node is not functioning properly to generate action potential at the proper intervals. The Purkinje fibers are not distributing the signal properly. The heart valves are not directing blood flow through the chambers properly.arrow_forwardDescribe in detail the effect of the automatic nervous system on the cardiac system. Include all associated structuresarrow_forward
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