Besides the supinator, which other muscle is a powerful supinator of the forearm?
A. Pronator teres
B. Pronator quadratus
C. Triceps brachii
D. Brachialis
E. Biceps brachii
E
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Which of the following terms describes a force acting on a body in a fluid in a direction perpendicular to the fluid flow?
A. wave drag B. surface drag C. form drag D. lift
Which of the following best describes the cerebral arterial circle (circle of Willis)?
A. An anastomosis surrounding the pituitary gland B. A portal system connecting the hypothalamus with the anterior pituitary C. A short anastomosis found in the cerebellum D. Formed by the superior and inferior sagittal sinuses E. An anastomosis circling the entire cortex
Thin filaments are composed of the protein actin?
a. true b. false
The substance that binds to the central chemoreceptors is
A) carbon dioxide B) hydrogen ions C) bicarbonate ions D) oxygen