Regional blood flow distribution US Medical PG Flashcards - Medical Study Cards
Master Regional blood flow distribution with OnCourse flashcards. These spaced repetition flashcards are designed for medical students preparing for NEET PG, USMLE Step 1, USMLE Step 2, MBBS exams, and other medical licensing examinations.
Regional blood flow distribution Flashcard Deck - 10 Cards
Flashcard 1: The effects of the autonomic nervous system on conduction velocity are called _____ effects
Answer: dromotropic
Flashcard 2: The adrenal medulla is the main physiologic source of _____
Answer: catecholamines (epinephrine, norepinephrine)
Flashcard 3: Activation of 1 adrenergic receptors results in _____ cardiac output
Answer: increased
Flashcard 4: NO is produced in _____ cells, then diffuses into smooth muscle cells leading to relaxation.
Answer: endothelial
Flashcard 5: Due to the high degree of oxygen extraction by the myocardium, increases in myocardial oxygen demand can only be met by an increase in _____
Answer: coronary blood flow
Flashcard 6: When total myocardial ischemia lasts less than 30 minutes, restoration of blood flow leads to _____ dysfunction
Answer: reversible contractile
Flashcard 7: _____ is defined as the fraction of the end-diastolic volume that is ejected in each stroke volume
Answer: Ejection fraction
Flashcard 8: What three cell types are considered latent pacemakers?_____
Answer: cells of the AV node, bundle of His, and Purkinje fibers
Flashcard 9: According to the law of Laplace, cardiac wall tension (T) = _____
Answer: P*r / 2H
Flashcard 10: What is the clinical significance of watershed zones in cerebral circulation?
Answer: areas at the border of two artery distributions are prone to hypoxia and infarction during severe hypotension
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