Basal cell carcinoma usually ________.
A. spreads through organs
B. penetrates to muscle and bone
C. affects all melanocytes
D. spreads locally
Answer: D
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__________ pass(es) from the maternal blood to the fetal blood. Fetal __________ pass(es) the other way.
A. Carbon dioxide and oxygen; wastes B. Carbon dioxide; nutrients C. Wastes; nutrients and oxygen D. Wastes and nutrients; oxygen and carbon dioxide E. Oxygen and nutrients; wastes
Unlike B cells, which secrete antibodies that can attack antigens at long distances, __________ must directly contact their targets, a process known as __________ immunity
Indicate whether the statement is true or false
Lymph tends to stall inside lymph nodes. This is due to:
A. small-diameter spaces within the medulla. B. the large volume of lymph entering the node. C. fewer efferent lymphatic vessels than afferent lymphatic vessels. D. fewer afferent lymphatic vessels than efferent lymphatic vessels.
Ependymal cells line the inner cavities of the CNS.
Answer the following statement true (T) or false (F)