Which class of major histocompatibility molecules is specific to antigen-presenting cells?
A. MHC class II
B. MHC class I
Answer: A
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The heart valves
A. permit the passage of blood in one direction. B. separate the right and left sides of the heart. C. are only used in the fetal heart. D. stabilize and hold the arteries leaving the heart. E. direct the conduction impulse through the heart muscle.
Which of the following is not true about a positive Babinski reflex?
A) normal in newborns B) abnormal in adults C) a sign of injury to descending spinal tracts D) clinicians test this when a peripheral nerve injury is suspected E) flaring of the toes when the sole is stroked
A molecule produced by cells of the right arm moves into a nearby lymphatic vessel. This molecule will eventually enter the bloodstream by passing through the ________ into the ________.
A. right lymphatic trunk; right subclavian vein B. thoracic duct; right subclavian vein C. thoracic duct; superior vena cava D. right lymphatic trunk; superior vena cava
Lactic acid fermentation only occurs when oxygen is absent.
Answer the following statement true (T) or false (F)