Hemodynamics — Flashcards

Flashcard 351: How does exercise affect total peripheral resistance? _____

Answer: Decreased TPR

Flashcard 352: What is the effect of anemia on blood viscosity? _____

Answer: Decreased

Flashcard 353: The velocity of shortening of cardiac muscle is maximal when afterload is _____

Answer: zero

Flashcard 354: 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.

Flashcard 355: The lateral area of the hypothalamus is stimulated by:

Answer: ghrelin

Flashcard 356: When a blood vessel is added to a system in series, the total resistance _____

Answer: increases

Flashcard 357: Abnormal secondary hemostasis may occur due to _____ failure, which causes decreased production of coagulation factors

Answer: liver

Flashcard 358: Which organ of the body has the most effective oxygen extraction?_____

Answer: Heart

Flashcard 359: Vasodilation (e.g., following antihypertensive therapy) reduces _____-load

Answer: after

Flashcard 360: What is the major factor determing autoregulation of blood flow to the heart?_____

Answer: Local metabolites