Aspirin inhibits blood clotting by directly preventing ________.
A. clot retraction
B. thrombin formation
C. fibrin formation
D. platelet plug formation
Answer: D
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Both chemically- and structurally-speaking, which of these compounds does not belong?
A) carbohydrates B) lipids C) proteins D) salts E) nucleic acids
The chemical bonding behavior of an atom is directly determined by
A) the size of the atom. B) the number and arrangement of electrons. C) the mass of the atom. D) the number of protons. E) the number of neutrons.
Which of the following is NOT an age-related change in skeletal muscle?
A. Loss of synapse surface area B. Decreased recovery time C. Decrease in motor units D. Loss of fast-twitch fibers E. Loss of muscle strength
Most sensory input that ascends through the spinal cord and brainstem projects to the
A. pineal gland. B. hypothalamus. C. thalamus. D. mammillary bodies. E. subthalamus.