Exam 3: NU 606 / NU606 (Latest 2025 / 2026) Advanced Pathophysiology | Questions with Verified Answers | 100% Correct| Grade A – Regis.

Exam 3: NU 606 / NU606 (Latest
) Advanced
Pathophysiology | Questions with
Verified Answers | 100% Correct|
Grade A – Regis.
Question:
what is the only anatomical connection between atrial and ventricle
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conduction in the heart? i,- i,- i,-




Answer:
AV node
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Question:

where does the cardiac electrical impulse go after the AV node?
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Answer:

av bundle/ bundle of His, the right and left bundle branches, and the
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terminal purkinje network of fibers
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Question:
what stimulates ventricular contraction?
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,Answer:
terminal purkinje fibers?
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Question:

what does the P wave represent in an ECG?
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Answer:
atrial depolarization
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Question:
what does the QRS wave represent in an ECG?
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Answer:

depolarization of the ventricles - during that time it masks the effect of
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atrial repolarziation
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Question:

what does the T wave represent on an ECG?
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Answer:

ventricular repolarization
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,Question:
where is the cardiac control center and what does it do?
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Answer:

medulla of the brain. responds to changes from the baroreceptors (which
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detect BP and are located in the aorta and carotid) . activate sympathetic
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nervous system or parasympathetic nervous system to alter the rate and
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force of cardiac contractions
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Question:
What does activation of the sympathetic nervous system (SNS) do??
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Answer:

tachycardia and contractility i,- i,-




Question:

What does activation of the parasympathetic nervous system do??
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Answer:

bradycardia through Vegas nerve i,- i,- i,-




Question:

what are the two layers of the pericardial sac?
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Answer:
outer fibrous pericardium anchors the heart to diaphragm
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, visceral pericardium (epicardium) has a serous membrane
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Question:

what is unique about cardiac muscle (myocardial fibers)?
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Answer:

- no nerves are present
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intercalated discs at the junctions between fibers (they contain
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desmosomes, connections to prevent muscle cells from separating during
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contraction, and gap junctions, which permit ions to pass from cell to cell
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which facilitates rapid transmission of impulses
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Question:
what ensures that all muscle fibers of the two atria followed by the two
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ventricles contract together or shortly after as it were?
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Answer:
gap junctions and desmosomes
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Question:

where does a conduction impulse start?
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Answer: