During a difficult delivery an obstetrician uses forceps to extract the infant. Upon examining the baby you notice forceps impressions posteroinferior to the ear. You are most concerned that the:
A) forceps may have penetrated a fontanelle.
B) middle ear cavity may have been crushed.
C) facial nerve may have been injured.
D) mastoid process may have been avulsed.
E) styloid process and associated muscles may have been avulsed.
Ans: C
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On axial images, the dip of the meningeal layer of the dura mater in the longitudinal fissure is identified as the
A. falx cerebri. B. falx cerebelli. C. tentorium cerebelli. D. diaphragma sella
Which of the following does not diminish lung compliance?
A) factors that block the bronchi B) factors that impair the flexibility of the thoracic cage C) factors that reduce the natural resilience of the lungs D) factors that decrease the surface tension of the fluid film of the alveoli
Which organ system does not excrete waste?
A. The urinary system B. The digestive system C. The respiratory system D. The cardiovascular system E. The integumentary system
Astigmatism is due to a(n)
A. shortened eyeball. B. elongated eyeball. C. increased pressure inside the eye. D. misshapen cornea or lens.