What genetic disorder is caused by having three chromosomes 21?
A. albinism
B. sickle-cell disease
C. hemophilia
D. Down syndrome
E. achondroplasia
D
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The effects of activating the complement system include all of the following except
A) destruction of target cell plasma membranes. B) stimulation of inflammation. C) inhibition of the immune response. D) opsonization. E) chemotaxis.
A person with type AB blood has ________ RBC antigen(s).
A. anti-B B. A and B C. anti-A D. anti-A and anti-B E. no
The urinary bladder is found in which abdominopelvic region?
A. Umbilical B. Left lumbar C. Right iliac D. Hypogastric
To focus on objects closer than 20 feet,
A. the lens must become flatter. B. the cornea must move inward. C. the ciliary muscles must contract. D. the suspensory ligaments increase tension on the lens. E. the retina must bend.