The mediastinum
A) contains the pleural cavities.
B) separates the pleural cavities.
C) contains the pericardial cavity.
D) contains the pleural cavities and pericardial cavity.
E) separates the pleural cavities and includes the pericardial cavity.
E
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Anti-D antibodies are present in the blood of
A) all individuals with type AB blood. B) Rh negative individuals who have been exposed to the D surface antigen. C) all Rh positive individuals. D) Rh positive individuals who have been exposed to the D surface antigen. E) all Rh negative individuals.
Which of the regions of a sarcomere contain titin?
a) the A band only b) the H zone only c) the zone of overlap only d) from M line to Z disc e) the I band only
Most people retain adequate kidney function in old age. Why?
A. Decreased activity in old age leads to a decrease in production of toxins. B. Glomeruli grow new blood vessels through life. C. Nephrons use blood more efficiently. D. Older people drink less fluid and therefore have less need to produce urine. E. A loss of nephrons does not radically impair function because there are so many to begin with.
What is lymph?
A) Saline solution in the lymph nodes B) Mucus secreted by lymph nodes C) An inflamed lymph node D) Interstitial fluid that has been drawn into a lymphatic vessel