A dehydrated runner drinks a lot of water after a race. He or she rehydrates because
A. the contents of the digestive tract and the bloodstream are isotonic compared to each other.
B. water will diffuse from an area where its concentration is low to an area where its concentration is high.
C. the contents of the digestive tract are hypotonic compared to the bloodstream.
D. the bloodstream is hypotonic compared to the contents of the digestive tract.
Answer: C
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Trachoma is caused by
a) Chlamydia trachomatis. b) Neisseria gonorrhoeae. c) Aspergillus. d) Haemophilus influenzae.
All lipids are ________
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