At which stage is the human embryo most susceptible to toxic substances?
A) During the fourth and fifth months
B) During organogenesis
C) During cleavage
D) Just before birth
E) During the last trimester
B
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The dry region on the ____ side of mountains is referred to as a rain shadow
a. usually moisture-laden b. windswept c. highest d. windward e. leeward
Which structure produces cell movements?
a. intermediate filaments b. flagella c. collagen d. microfilaments e. centrioles
Someone who has broken an arm and has had a cast on it for months will notice a distinct shrinking of the arm once the cast is removed. Why does this happen?
A) The cast has reduced blood flow to the muscle tissue to reduce swelling. B) Muscles that are not used will atrophy. C) The other arm was used more to compensate for the unused one, and it has become stronger. D) If the person was right-handed, he or she will become left-handed.
Exfoliative toxin is responsible for
A) otitis externa. B) impetigo. C) fever blisters. D) scalded skin syndrome. E) thrush.