Once cells in the SA node reach threshold,
A) a heart attack occurs.
B) the heart stops beating.
C) nothing happens until the AV node is innervated.
D) an action potential is triggered.
D
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This forearm muscle is a powerful wrist flexor
A) palmaris longus B) extensor digitorum C) flexor carpi radialis D) pronator teres
Which duct drains lymph from parts of the body other than the head, the right arm, and the right side of the thorax?
A. Right lymphatic duct B. Subclavian vein C. Thoracic duct D. None of these are correct.
Carbohydrate metabolism involves the reactants, glucose plus oxygen, and the resultant products
A) pyruvate and nitrogen. B) carbon dioxide and water. C) water and sucrose. D) nitrogen and hydrogen. E) water and pyruvate.
Which part of the brain contains the arbor vitae?
A. Pons B. Medulla oblongata C. Cerebrum D. Cerebellum E. Epithalamus