High doses of aspirin can stimulate clotting by inhibiting the synthesis of
A) plasmin.
B) prostacyclin.
C) thrombomodulin.
D) tissue plasminogen activator.
E) protein C.
Ans: B) prostacyclin.
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Which of the following is a neurohormone?
a. vasopressin b. thyroid hormone c. growth hormone d. cortisol e. luteinizing hormone
Which of the following is NOT a stage in the development of the central nervous system?
A) neural tube B) neural plate C) three-vesicle (three-pouch) brain D) four-vesicle (four-pouch) brain
Which one of the following bones does NOT contain paranasal sinuses?
A) frontal B) sphenoid C) mandible D) ethmoid E) maxilla
Why is early closure of the fontanelles sometimes associated with mental retardation?
A. The skull is asymmetrical. B. The brain cannot grow normally. C. The cranial nerves are compressed. D. The meninges do not attach properly to the skull. E. The spinal cord does not develop properly.