In passive immunity, __________ are introduced into the body by injection.
a. antibodies
b. lymphocytes
c. antigens
d. T and B cells
Ans: a. antibodies
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All of the following may be associated with a "heart block" except:
A) section of the superior part of the thoracic sympathetic trunk. B) coronary artery disease. C) loss of synchrony between atrial and ventricular contractions. D) use of an artificial pacemaker. E) ventricular fibrillation.
The anterior cavity is
A) hollow. B) filled with aqueous humor. C) filled by the vitreous body. D) filled with perilymph. E) filled with endolymph.
A curvature defect of the lens or cornea in which some parts of an image are in focus on
the retina and other parts are blurred and vision is distorted is called A) presbyopia. B) myopia. C) astigmatism. D) hyperopia.
The stomach is ________ to the left kidney
A) lateral B) anterior C) inferior D) superior