Vitellogenin is a phospholipoprotein produced by the
A) Follicle cells.
B) Insect fat body.
C) Vertebrate liver.
D) All of the above
Answer: D
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The hair cells for hearing are located in the
a. cochlea. b. Eustachian tube. c. saccule. d. utricle. e. vestibule.
The portion of the transmembrane receptor that binds to hydrophilic messengers is termed the
A) Receptor-binding domain. B) Transmembrane domain. C) Ligand-binding domain. D) Intracellular domain.
An initial stimulus produces a response that reinforces the stimulus in
A) positive feedback. B) homeostasis. C) negative feedback. D) regulation. E) integration.
Which of the following muscles move the testes towards the body?
A) the cremaster B) the tunica muscularis C) the biceps brachii D) the dartos E) both the cremaster and the dartos