Contraction of the cremaster and dartos muscles
A. causes the epididymis to shrink.
B. increases during exercise.
C. is responsible for ejaculation.
D. pull the testes closer to the body.
E. causes the penis to become erect.
Answer: D
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By about 12 weeks of development, the ________ take(s) over the role of secreting estrogens and progesterone to maintain the uterine lining.
A. ovaries B. uterus C. placenta D. fetus
In a covalent bond
A) oppositely charged atoms attract. B) atoms share a pair or more of electrons. C) like-charged atoms repel. D) one atom loses and another atom gains electrons.
The cone-shaped section of bone located at the base of each temporal bone is called the:
A) lamboid suture. B) mastoid process. C) cribriform plate. D) ethmoid bone.
As sound levels increase in the spiral organ (of Corti), ________.
A) outer hair cells stiffen the basilar membrane B) outer hair cells bend the cilia away from the kinocilium C) inner hair cells stiffen the basilar membrane D) inner hair cells bend the cilia away from the kinocilium