Laboratory Manual for Human Anatomy & Physiology Main Version
4th Edition
ISBN: 9781260159110
Author: Terry Martin
Publisher: Mcgraw-hill Higher Education (us)
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Textbook Question
Chapter 45, Problem 8PL
The P wave of an ECG occurs during the repolarization of the atria.
a. True ________
b. False ______
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Check out a sample textbook solutionStudents have asked these similar questions
This abnormal ECG indicates:
A
ventricular fibrillation
B
premature ventricular contractions (PVCs)
C ST-segment elevation
D premature atrial contractions (PACS)
hahah
The QRS-complex of the ECG is generated by the depolarization of the
AV-Node & Ventricular Myocardium.
A. true
B. false
In the following ECG diagram, Which of the following is the right diagnosis?
Atrial fibrillation.
b.
Ventricular fibrillation
c.
Angina pectoris.
d.
Myocardial infarction.
e.
Third degree heart block.
Chapter 45 Solutions
Laboratory Manual for Human Anatomy & Physiology Main Version
Ch. 45 - The _______ of the conduction system is known as...Ch. 45 - The ________ of the conduction system is/are...Ch. 45 - The first of two heart sounds (lubb) occurs when...Ch. 45 - One cardiac cycle would consist of a. left chamber...Ch. 45 - The SA node of the heart is located in the a....Ch. 45 - The depolarization of ventricular fibers is...Ch. 45 - The dupp sound occurs when the semilunar valves...Ch. 45 - The P wave of an ECG occurs during the...Ch. 45 - The period during a heart is contracting is called...Ch. 45 - The period during which a heart chamber is...
Ch. 45 - During ventricular contraction, the AV valves...Ch. 45 - During ventricular relaxation, the AV valves are...Ch. 45 - The pulmonary and aortic valves open when the...Ch. 45 - The first sound of a cardiac cycle occurs when the...Ch. 45 - The second sound of a cardiac cycle occurs when...Ch. 45 - The sound created when blood leaks back through an...Ch. 45 - What changes did you note in the heart sounds when...Ch. 45 - What changes did you note in the heart sounds...Ch. 45 - Prob. 3.1ACh. 45 - The ____________________ node is located in the...Ch. 45 - The fibers that carry cardiac impulses from the...Ch. 45 - Prob. 3.4ACh. 45 - The P wave corresponds to depolarization of the...Ch. 45 - The QRS complex corresponds to depolarization of...Ch. 45 - The T wave corresponds to repolarization of the...Ch. 45 - Why is atrial repolarization not observed in the...Ch. 45 - Identify the heart chambers and conduction system...Ch. 45 - How much time passed from the beginning of the P...Ch. 45 - What is the significance of this P-R interval?Ch. 45 - How can you determine heart rate from an...Ch. 45 - As blood in the ventricles surges back against the...
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- Lower-than-normal blood pressure is called _______________________.arrow_forwardOn an ECG, if every other P wave (e.g., every even is, and every odd is not) is NOT followed by the QRS complex, this is: A. first degree AV block B. second degree AV block C. third degree AV block D. atrial fibrillationarrow_forwardUsing the ECG recording provided below, how do we know that this extrasystole event (i.e., indicated by the arrow) is occurring in the ventricles and not the atria? a. None of the options are correct b. Extrasystole event is smaller in amplitude than the QRS complex c.Event occurs after a T-wave d.Large ECG amplitude compared with the P-wave e.Event occurs after a P-wavearrow_forward
- Indicate the correct order of the sequence of events occurring during congestive heart failure. Order the sentences (Hint: End with "g") This question is a great summary of what happens, in steps, in congestive heart failure. a. narrowed bicuspid valve makes the L atrium pump harder in order to "push" blood into the L ventricle through an opening that is too narrow. b. pressure of the extra, backed up blood in the lung creates pressure in the capillaries that begin to leak fluid into the lung. c. extra "left-over" blood in the atrium that has not descended into the ventricle after a beat has nowhere to go. d. congenital heart defect causes a narrowed bicuspid valve e. not all blood gets "pushed" from the L atrium to the L ventricle during a regular heart beat f. blood that backed up in the L atrium with nowhere to go backs up further, into the pulmonary veins and eventually into the lung g. the patient gets less oxygen with each breath, feels tired all the time and is…arrow_forwardSuppose that a pacemaker activity in the AV node overtakes the SA node rhythm. A. What could be the implicatiosn for the atrial and ventricular contraction-relaxation? B. Draw the ECG for this situation and explain the differences compared to a normal ECG (if any)arrow_forwardIn regards to the EKG all of the following are correct except A. The P-wave is also known as atrial systole B. The QRS complex represents ventricular systole C. DJ wave is a normal wave seen an atrial repolarization D. The T waves also ventricular diastole Choose the correct answerarrow_forward
- Fill in the blank: During ventricular relaxation, the A-V valves remain _______________________.arrow_forwardWhich of the following is true of the EKG? A. Depolarization of the atria cannot be seen on the EKG B. Repolarization of the atria cannot be seen on the EKG. C. Depolorization of the ventricles cannot be seen on the EKG. D. Repolorazition of the ventricles cannot be seen on the EKG.arrow_forwardThe following is an abnormal ECG. Based on this abnormality, what would you guess heart rate to be?arrow_forward
- Use the ecg graph to explainarrow_forwardDuring ventricular diastole, pressure in the ventricles falls to ____ mm Hg, while the pressure within the large arteries is about ____ mm Hg.A. 120, 80B. 80,120C. 80,0D. 0,80E. 40, 1204. Whereas (a) reflex is most important for regulating mean arterial pressure on a short-term basis; And (b) mechanism is most important for regulating mean arterial pressure on a long-term basis.(a)A. baroreceptor (b) chemoreceptorB. chemoreceptor (b) baroreceptor C. chemoreceptor(b) hormonal D. hormonal (b) baroreceptorE. baroreceptor (b) hormonalarrow_forwardIdentify the TRUE statement (s). There may be several correct answers. A. An increased cardiac output is reflected in an elevated diastolic pressure.B. An increased cardiac output is reflected in a decreased diastolic pressure.C. An increase in the force of contraction produces an elevated systolic pressure.D. An increase in the force or ventricular contraction produces a decreased diastolic pressure.arrow_forward
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