The tube that carries urine out of the body is called the ________.
A. urethra
B. collecting tube
C. trigone
D. ureter
Answer: A
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Which pressure remains negative throughout the respiratory cycle?
A) intrapulmonary B) intrapleural C) intra-alveolar D) atmospheric E) intrapulmonary and intra-alveolar
A G protein is
A. a type of water-soluble hormone. B. a second messenger activated by a steroid hormone. C. a molecule that binds a guanine nucleotide and helps transduce a signal inside a target cell. D. a receptor for a water-soluble hormone that causes arachidonic acid to be extracted from a phospholipid. E. an enzyme that catalyzes the conversion of ATP into cyclic AMP.
The heart, lungs, and small intestine are in body cavities located on the ________ side of the body.
A) dorsal B) proximal C) sagittal D) ventral E) superficial
Why does a figure skater cross his arms tightly across the chest when performing a quadruple axel?
A. to reduce moment of inertia B. to increase angular velocity C. to increase time in the air D. both A and B E. all of the above