Cardiovascular responses to exercise — Flashcards

Flashcard 1: Blood flow (Q) is _____ proportional to the resistance of blood vessels

Answer: inversely

Flashcard 2: In response to exercise, there is _____ venous O2 content

Answer: decreased

Flashcard 3: Activation of beta-2 (β2) adrenergic receptors causes _____ systemic vascular resistance (SVR)

Answer: decreased

Flashcard 4: The rate at which blood is pumped from either ventricle is called the _____

Answer: cardiac output

Flashcard 5: Ideally, blood flow in the cardiovascular system is _____, or streamlined

Answer: laminar

Flashcard 6: The velocity of shortening of cardiac muscle is maximal when afterload is _____

Answer: zero

Flashcard 7: What is the major factor determining blood flow to resting skeletal muscle?

Answer: Sympathetic innervation (α1 receptors)

Extra: At rest, skeletal muscle blood flow is primarily controlled by **sympathetic innervation** (extrinsic control). During exercise, blood flow is dominated by **local metabolic factors** (intrinsic control/autoregulation) such as lactate, adenosine, and K+.

Flashcard 8: What kind of nerves carry inputs to the cerebellum?

Answer: climbing and mossy fibers

Flashcard 9: coordination of extremities

Answer: lateral cerebellum

Flashcard 10: Aδ type free nerve ending

Answer: myelinated, fast conduction

Extra: skin, viscerapain, temperature