In a mother who has recently delivered a child, afterpains occur when
A. oxytocin triggers uterine contractions.
B. estrogen triggers prostaglandin release.
C. progesterone inhibits prostaglandin release.
D. dopamine triggers uterine contractions.
Answer: A
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Villi
A. generate movement of materials in the large intestine. B. contain both smooth and skeletal muscle fibers. C. increase surface area in the small intestine. D. are found throughout the gastrointestinal tract. E. All of the choices are correct.
After heavy exercise, if energy reserves in a muscle are depleted, ____________ occurs.
A) atrophy B) tetanus C) paralysis D) treppe E) an oxygen debt
Two thigh muscles that are antagonists are the
A) rectus femoris and vastus lateralis. B) vastus medialis and vastus intermedius. C) adductor longus and vastus lateralis. D) rectus femoris and semimembranosus. E) gluteus maximus and semitendinosus.
Which layer of the digestive tract is in direct contact with the food that is consumed?
A) mucosa B) muscularis C) serosa D) submucosa