Carbon dioxide and water combine to form
A) hydrochloric acid.
B) oxygen.
C) carbonic acid.
D) carbaminohemoglobin.
E) nitric acid.
C
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Chinchillas clean themselves by ____________
Fill in the blank(s) with correct word
The neural tube and neural crest cells are of endodermal origin.
Answer the following statement true (T) or false (F)
Schwann cells differ from oligodendrocytes in which of the following ways?
A. Schwann cells form myelin; oligodendrocytes do not. B. Oligodendrocytes are only found in the PNS; Schwann cells are only found in the CNS. C. Schwann cells form sheaths around several axons, while oligodendrocytes form sheaths around only one axon. D. Schwann cells form a myelin sheath around a portion of only one axon, while oligodendrocytes can surround portions of several axons. E. None of these choices are true differences.
Choose the arrangement that lists the chemicals in the order in which they would be used for coagulation. (1) thrombin (2) fibrinogen (3) prothrombinase (4) activated factor XII
A. 3, 2, 4, 1 B. 4, 3, 2, 1 C. 4, 3, 1, 2 D. 3, 4, 1, 2 E. 3, 1, 4, 2