Stains for the demonstration of spirochetes are based on their property of:
a) argentophilia
b) argyrophilia
c) metachromasia
d) acid fuchsin
Answer: b) argyrophilia
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What would be most likely to occur if one of a man's testicles failed to descend (drop into the scrotum)?
A. The pH of his semen would be higher than normal. B. Gonadotropins within the undescended testicle would be inactivated. C. He would have a lower than normal sperm count. D. He would be unable to undergo spermatogenesis. E. He would have exaggerated secondary sex characteristics.
Which statement best describes the activity of the sodium-potassium pump?
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A karyotype:
A) shows chromosomes as they appear before replication. B) can show the number of chromosomes in a cell. C) can reveal the location of a gene. D) can reveal the presence of cancerous genes.