Frequently, several different signals or molecules are needed in order to produce an immune response by a B cell or T cell. The second signal in this process is called ________.
A. complement activation
B. opsonization
C. antigen processing
D. costimulation
E. copresentation
Answer: D
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Which of the following veins empty directly into the inferior vena cava?
A) left gonadal B) hepatic portal C) azygos D) left adrenal E) renal
Depth of field is ________
A) greatest at high power and increases as magnification increases B) greatest at high power and decreases as magnification increases C) greatest at scanning power and decreases as magnification increases D) greatest at low power and increases as magnification increases
Where do sympathetic nerve fibers that do not synapse in the paravertebral ganglia synapse instead?
A. Spinal cord B. Their target organs C. Intramural ganglia D. Collateral ganglia E. Sympathetic chain ganglia
Ascites, the accumulation of fluid in the peritoneal cavity, would not be caused by
A) liver disease. B) cancer. C) kidney disease. D) dehydration. E) heart failure.