USMLE Online Practice Questions and Answers
A 42-year-old woman is brought to the emergency department because of double vision that began 20 minutes after she fell from her horse and landed on the left side of her face. Examination of the face shows ecchymoses over the left zygomatic arch. A CT scan of the head is shown. Which of the following arteries is at greatest risk for injury in this patient?
A. Facial
B. Frontal
C. Infraorbital
D. Lacrimal
E. Ophtmalmic
Which of the following is not a side effect of the cholinoreceptor blocker (Atropine)?
A. Increased pulse
B. Urinary retention
C. Constipation
D. Mydriasis
Which of the following is the antidote for the toxin Copper?
A. Glucagon
B. Aminocaproic acid
C. Atropine
D. Penicillamine
Angiotensin I is changed by which of the following into Angiotensin II?
A. ACE
B. AVT
C. Pepsin
D. Adenosine
Which of the following is not an associated change during the antepartum period?
A. Increased urination frequency
B. Increased respiratory requirements
C. Decreased basal metabolic rate
D. Goodell's sign
The brachiocephalic artery divides to form the right common carotid and the ____ ____ artery.
A. Left subclavian
B. Right subclavian
C. Left common carotid
D. Right thoracic artery
Which of the following is not considered a tributary of the portal vein?
A. Inferior mesenteric vein
B. Splenic vein
C. Left gastric vein
D. Subclavian vein
Which of the following signs and symptoms is not linked to Haemophilus influenzae?
A. Otitis media
B. Pneumonia
C. Malaria
D. Epiglottis
Supporting cells located within the CNS are collectively called _____.
A. Neuroglia
B. Astrocytes
C. Perikaryon
D. Satellite cells