What is the effect of hypoxia (low O2) and hypercapnia (high CO2) on contractility (and SV)?_____
#2
Activation of 1 adrenergic receptors results in _____ cardiac output
#3
Cardiac contractility increases with _____ extracellular Na+
#4
The _____ is the contractile unit of the myocardial cell
#5
The effects of the autonomic nervous system on heart rate are called _____ effects
#6
_____ is the ability of cardiac cells to initiate action potentials in response to inward, depolarizing current
#7
What is the clinical significance of watershed zones in cerebral circulation?
#8
Which basal ganglia pathway inhibits movement?
#9
What is the phrase used to describe action potential conduction in myelinated nerves?
#10
What is the function of myelin?
Contractility determinants US Medical PG Flashcards - Medical Study Cards
Master Contractility determinants 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.
Flashcard 1: What is the effect of hypoxia (low O2) and hypercapnia (high CO2) on contractility (and SV)?_____
Answer: Decreased
Flashcard 2: Activation of 1 adrenergic receptors results in _____ cardiac output
Answer: increased
Flashcard 3: Cardiac contractility increases with _____ extracellular Na+
Answer: decreased
Flashcard 4: The _____ is the contractile unit of the myocardial cell
Answer: sarcomere
Flashcard 5: The effects of the autonomic nervous system on heart rate are called _____ effects
Answer: chronotropic
Flashcard 6: _____ is the ability of cardiac cells to initiate action potentials in response to inward, depolarizing current
Answer: Excitability
Flashcard 7: 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
Flashcard 8: Which basal ganglia pathway inhibits movement?
Answer: indirect
mnemonic: indirect inhibits
Flashcard 9: What is the phrase used to describe action potential conduction in myelinated nerves?
Answer: saltatory conduction i.e. AP basically jumps from node to node
Flashcard 10: What is the function of myelin?
Answer: increases neuronal conduction velocity
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Contractility determinants Flashcards for USMLE
Study 10 flashcards on Contractility determinants for USMLE Physiology. These active recall cards cover the key concepts, clinical associations, and high-yield facts from this chapter of Cardiovascular. Each card is designed to test your understanding rather than just recognition, building stronger and more durable memories for exam day.
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