Migration of which of the following to different parts of the embryo produces various tissues and organs?
A) the blastocoel
B) morula cells
C) neural crest cells
D) notochord cells
E) the animal pole
Answer: C
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If the concentration of thyroid hormone is
high,
a. the secretion of thyroid-releasing hormone is inhibited. b. the secretion of thyroid stimulating hormone is increased. c. calcitonin production is increased. d. resting metabolism decreases. e. more than one of these occurs
Brucellosis is
A. diagnosed with serological testing of the patient's blood. B. an occupational illness of people who work with animals. C. seen in patients as a fluctuating fever, with headache, muscle pain, and weakness. D. treated with a 3-6 week course of antibiotics. E. All of the choices are correct.
Both smooth muscle fibers and cardiac muscle fibers:a
have striations. b. are under involuntary control. c. are multinucleate. d. have a comparable intermediate resistance to fatigue. e. have a comparable intermediate speed of contraction.
How does fungal mitosis differ from animal mitosis?
A. The spindle apparatus is unique to fungal mitosis. B. The nuclear envelope remains intact in fungal mitosis. C. Fungi only undergo meiosis; true mitosis is only found in animals. D. Cytokinesis only occurs in fungal mitosis.