Hemodynamics — Flashcards

Flashcard 281: Edema may be caused by _____ capillary pressure (Pc)

Answer: increased

Flashcard 282: Arteriolar resistance is regulated by the _____ nervous system

Answer: sympathetic

Flashcard 283: The resistance of a vessel may be calculated using Poiseuille's equation, which states R = _____

Answer: (8 * η * L) / (π * r^4)

Flashcard 284: Viscosity of blood depends mostly on _____

Answer: hematocrit

Flashcard 285: Burns can cause massive volume loss by alteration of _____

Answer: capillary permeability (Kf)

Flashcard 286: TNF-α is a cytokine released from _____ that mediates cachexia and shock

Answer: macrophages

Flashcard 287: _____ is an increase in blood flow in response to a prior period of decreased blood flow

Answer: Reactive hyperemia

Flashcard 288: What is the effect of cardiac tamponade on cardiac output? _____

Answer: Decreased CO

Flashcard 289: What type of receptor acts as a pressure sensor?_____

Answer: Baroreceptor

Flashcard 290: What is the primary mechanism regulating blood flow to the skin?

Answer: Sympathetic innervation

Extra: Skin blood flow is primarily under extrinsic (sympathetic) control for the purpose of thermoregulation. Unlike the heart, brain, and kidneys, the skin exhibits minimal intrinsic autoregulation.