Which of the following medications prevents blood clot formation?
A) hematinic
B) anticoagulant
C) antihemorrhagic
D) thrombolytic
B
Explanation: An anticoagulant prevents blood clot formation. A hematinic increases erythrocytes or hemoglobin in the blood. An antihemorrhagic prevents or stops hemorrhaging. A thrombolytic dissolves an existing clot.
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The cephalic vein:
A) becomes the brachial vein. B) becomes the axillary vein. C) originates on the medial side of the dorsal venous network at the wrist. D) pierces the clavipectoral fascia. E) empties into the subclavian vein.
During a secondary immune response, high-affinity IgG antibodies are produced. Which of the following best explains why low-affinity IgM antibodies are not made?
a. Naive pathogen-specific B cells are suppressed by negative signaling through Fc?RIIB1. b. Naive pathogen-specific B cells isotype switch and hypermutate much more quickly during secondary immune responses. c. Memory B cells outnumber naive B cells. d. Low-affinity IgM antibodies are made only when antigen concentration is exceedingly high.
The difference in effective doses between drugs used for the same purpose is:
(a) synergism (b) antagonism (c) potency (d) the dose–response relationship
The lungs extend from the collarbone to the diaphragm in the thoracic cavity.?
Indicate whether the statement is true or false