The congenital heart defect most often associated with Down syndrome is
A) ventricular septum defect.
B) patent foramen ovale.
C) tetralogy of Fallot.
D) atrioventricular septal defect.
E) transposition of the great vessels.
Answer: D
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In which nervous system does the synapse of the preganglionic and postganglionic neurons usually occur close to the spinal cord?
a. parasympathetic nervous system b. sympathetic nervous system c. both the parasympathetic and sympathetic nervous systems
Eicosanoids are derived from ________.
A. leukotriene B. prostaglandins C. prostacyclin D. arachidonic acid E. thromboxanes
When you wiggle the tip of your nose with your fingers, the flexibility of the nose is due to the presence of which tissue?
A. Hyaline cartilage B. Elastic cartilage C. Areolar connective tissue D. Fibrocartilage E. Reticular connective tissue
In the following lateral radiograph of the thoracic part of the vertebral column, the arrow points to the:
A) head of a rib. B) pedicle of vertebra. C) superior articular facet. D) lamina of vertebrae. E) spinal nerve.