As you are lifting a box, someone places extra weight on top of it. For your muscle to continue contracting and lifting the box, the muscle must ________.
A. shift from isometric to isotonic contraction
B. recruit more muscle fibers
C. shift from slow-twitch to fast-twitch mode
D. lower its threshold
E. reduce its wave summation
Answer: B
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The release of tissue thromboplastin initiates
A) the extrinsic clotting mechanism. B) hemolysis. C) platelet plug formation. D) the intrinsic clotting mechanism.
__________ is the arrest of bleeding from a broken blood vessel
Fill in the blank(s) with correct word
AB ? A + B is to decomposition as A + B ? AB is to
A) exchange.
B) synthesis.
C) combustion.
D) replacement.
E) metabolism.
The extensive connective tissue network, which encircles the bases of the pulmonary trunk and aorta and the valves of the heart, is called the ________ of the heart.
A) fibrous skeleton B) endocardium C) intercalated network D) pericardium E) pulmonary epicardium