The process of using ultrasound to disintegrate a cataract is known as:
A) electroretinogram.
B) phacoemulsification.
C) iridectomy.
D) enucleation.
B
Explanation:
A) An electroretinogram is a record of the retina's response to light.
B) Correct.
C) An iridectomy is removal of a portion of the iris.
D) Enucleation is removal of the entire eyeball.
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Which of the following statements regarding T-cell receptor recognition of antigen is correct?
a. ?:? T-cell receptors recognize antigen only as a peptide bound to an MHC molecule. b. ?? T-cell receptors recognize antigens in their native form. c. ?:? T-cell receptors, like B-cell immunoglobulins, can recognize carbohydrate, lipid, and protein antigens. d. Antigen processing occurs in extracellular spaces. e. Like ?:? T cells, ?:? T cells are also restricted to the recognition of antigens presented by MHC molecules.
Which of the following types of cancer is the most common and affects the tissues that line most body cavities?
A. sarcomas B. carcinomas C. neuroblastomas D. leukemias E. melanomas
Convert the decimal to a fraction. 86.3
A) 86 3/100 B) 86 3/10 C) 86 89/96 D) 86 3/20 E) 86 3/50
A disease in which the fluid inside the eye is under abnormally high pressure and can lead to blindness is
A. glaucoma. B. cataracts. C. conjunctivitis. D. presbyopia.