A test used to detect anti-Rickettsia antibodies in a patient's serum is the
A) direct fluorescent-antibody test.
B) indirect fluorescent-antibody test.
B
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Which endocrine gland is the main center for control
of the internal environment? a. pineal and thymus b. hypothalamus c. thyroid and parathyroids d. adrenal cortex and adrenal medulla e. pancreas and gonads
Within the phylum Cnidaria, corals are most closely related to:
A. Hydra. B. jellyfish. C. sea anemones. D. Portuguese man-of-war. E. hydrozoans.
How do gap junctions differ from desmosomes?
a. A gap junction bridges the space between cells. b. A gap junction is a much larger space between cells. c. A gap junction provides communication between cells. d. A gap junction can control the passage of materials between cells. e. A gap junction requires the use of ATP to open and close its channels.
Which of the following disorders has X-linked recessive inheritance?
a. sickle cell anemia b. phenylketonuria c. Duchenne muscular dystrophy d. achondroplasia