The portion of the inner layer of the eye that contains visual receptor cells (photoreceptors) is the:
A. canal
B. optic disk
C. retina
D. posterior cavity
c
Rationale: The retina is part of the inner layer of the eye that contains visual receptor cells (photoreceptors).
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Why should you refrain from putting too much pressure on a bleeding head wound?
a. Excessive pressure can collapse blood vessels. b. You may worsen any potential spinal injuries. c. You could injure the brain if the skull is fractured. d. You could endanger the person's airway.
What of the following influence the oxygen transfer from maternal to fetal blood? I. Maternal-fetal PO2 gradient II. Higher hemoglobin concentration in fetal blood III. Lower affinity of HbF for oxygen ?
A. II and III only B. I, II, and III C. I and II only D. I and III only
Computed tomography (CT) scanning of the chest would be least useful for which of the fol-lowing?
a. To evaluate the large vessels of the medi-astinum b. To evaluate the pleura c. To evaluate lung masses d. To evaluate patients with asthma
Alveolar tissue and pulmonary capillary injury is caused by which of the following?
a. Barotrauma b. Biotrauma c. Shear stress d. Overdistention