Hemodynamics — Flashcards

Flashcard 341: The pain in migraines is mediated by vasoactive peptides on meningeal vessels, which cause vaso-_____

Answer: dilation

Flashcard 342: What is the effect of obstructive sleep apnea on pulse pressure?_____

Answer: Increased pulse pressure

Flashcard 343: How does plasma protein concentration change with hyposmotic volume expansion (e.g. SIADH)? _____

Answer: Decreased

Flashcard 344: Somatostatin secretion is _____ in response to vagal stimulation

Answer: decreased

Flashcard 345: Pulse pressure is _____ proportional to stroke volume

Answer: directly

Flashcard 346: Which substance is released by the SNS to inhibit an erection (detumescence)?

Answer: Norepinephrine

Flashcard 347: How does hematocrit change with hyposmotic volume contraction (e.g. adrenal insufficiency)? _____

Answer: Increased

Flashcard 348: In response to decreased afferent baroreceptor firing, there is _____ efferent parasympathetic firing (baroreceptor reflex)

Answer: decreased

Flashcard 349: What effect may adenosine have on blood pressure?_____

Answer: Decreased (hypotension)

Flashcard 350: What does σ (sigma) represent in regards to capillary fluid exchange?

Answer: Reflection coefficient

Extra: The reflection coefficient (σ) is a value between 0 and 1 that describes the permeability of a membrane to a solute (usually plasma proteins). • σ = 1: The membrane is impermeable (100% reflection). • σ = 0: The membrane is completely permeable.