Which hormone plays a role in breast milk ejection (letdown) during lactation?
a. Cortisol
b. Prolactin
c. Oxytocin
d. Progesterone
ANS: C
Oxytocin controls milk ejection (let-down) from acini cells. Milk ejection is not associated with cortisol, prolactin, or progesterone.
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The ________ muscle provides for extension, adduction, and rotation of the arm inward
a. pectoralis major b. latissimus dorsi c. deltoid d. subscapularis
After positive pressure ventilation, a newborn's heart rate increases from 80 to 120 beats per minute. The EMT should:
A) Contact medical direction for instructions B) Continue positive pressure ventilation with less oxygen use C) Insert an oral airway and resume positive pressure ventilation D) Stop positive pressure ventilation and provide blow-by oxygen
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Indicate whether the statement is true or false
Which of the following is not a structural variation of the second molar from the first?
A. there are only four cusps B. it is smaller C. there are two roots D. the buccal groove divides two cusps