In the final step in the blood clotting process:
a. prothrombin reacts with fibrin to form fibrinogen
b. thrombin reacts with fibrinogen to form fibrin
c. prothrombin reacts with fibrin to form fibrinogen
d. prothrombin activator reacts with prothrombin to form thrombin
b. thrombin reacts with fibrinogen to form fibrin
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When a pacemaker potential in the SA node reaches threshold,
A. many voltage-gated Ca2+ channels open. B. permeability of the cell does not change. C. voltage-gated Ca2+ channels close. D. the permeability to K+ increases. E. resting membrane potential has been restored.
Which of the following is correctly matched?
A. Increased secretion of aldosterone - hyperkalemia B. Overuse of diuretics - hyperkalemia C. Alkalosis - hypokalemia D. Acidosis - hypokalemia E. Cell destruction - hypokalemia
Classify these joints to the correct structural classification: sutures, syndesmoses, and gomphoses
A) fibrous B) cartilaginous C) synovial D) amphiarthrosis
In a laboratory experiment, the resting membrane potential of a muscle is measured and is found to be more negative. Which of the following has occurred?
A. hyperpolarization B. repolarization C. depolarization D. isopolarization E. hypopolarization