Which of the following statements regarding complement is FALSE?
A. Certain complement proteins are always circulating in the blood in an inactive state.
B. Activated complement can form a membrane attack complex, which forms pores in microbe membranes.
C. Activated complement can stimulate cells to secrete inflammation-mediating chemicals.
D. The complement pathway is always dependent upon activation of the first complement protein, C1.
E. Some activated complement proteins activate other complement proteins.
D
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Some types of antihistamines make one sleepy, others do not. This difference is partly attributed to a difference in
A) whether or not the drug mimics the hormone melatonin. B) ATP-dependence of drug transport. C) the type of receptor involved. D) lipid solubility.
Regarding lactic acid regulation, which cells in the body consume extra oxygen and produce ATP for the conversion of excess lactate absorbed from the blood back to glucose?
A) neurons B) cardiac muscle cells C) skeletal muscle fibers D) liver cells E) erythrocytes
When the diaphragm contracts, _______.
A) it lifts the rib cage B) it rises in the thoracic cavity C) it flattens out D) it flattens out and it rises in the thoracic cavity
This figure illustrates bone growth in length at the Epiphyseal Plate. What is zone "C"?
A. zone of resting cartilage B. zone of proliferation C. zone of calcification D. bone of diaphysis E. zone of hypertrophy