The activity levels of juvenile hormones can be reduced by
A) Allatostatins.
B) Allatotropins.
C) JH esterase.
D) All of the above
Answer: D
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What is line "D" pointing to?
a) Fenestration b) Pedicel c) Filtration slit d) Basal lamina e) Lumen of the glomerulus
Arm and legs buds appear at about 28 days from
A. somitomeres. B. neural crest cells. C. apical ectodermal ridges. D. the coelom.
The apneustic centers promote quiet inhalation by stimulating the
A) ventral respiratory group (VRG). B) pre-Bötzinger complex. C) pneumotaxic centers. D) dorsal respiratory group (DRG). E) None of the answers is correct. The apneustic centers cannot promote inhalation.
The extensions of the sarcolemma that carry the nerve impulses deep into the sarcoplasm are the
A. sarcoplasmic reticulums. B. myoglobins. C. sarcolemmas. D. T tubules.