Of the lymphatic trunks, which ones drain lymph from deep thoracic structures?
A. Lumbar trunks
B. Bronchomediastinal trunks
C. Subclavian trunks
D. Jugular trunks
E. Intestinal trunks
Answer: B
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This portion of the brain secretes the hormone melatonin, which helps to regulate the body's circadian rhythm
A. Habenular nucleus B. Anterior nucleus C. Pineal gland D. Mammillary body E. Paraventricular nucleus
Which of the following is the correct pathway of the electrical impulses of the conducting system of the heart?
A. SA node ? AV node ? AV bundle ? AV branch ? Subendocardiac conducting network B. SA node ? AV bundle ? AV node ? AV branch ? Subendocardiac conducting network C. SA node ? AV node ? AV branch ? AV bundle ? Subendocardiac conducting network D. AV node ? SA node ? AV bundle ? AV branch ? Subendocardiac conducting network
Which of the following choices is not a basic feature of cellular communication?
A) The signal must be produced. B) The signal can be produced only by a eukaryote. C) The signal must be transported to a target cell. D) The target cell must respond to the signal.
A(n) ________ is a bridgework of trabecular bone that unites the broken ends of a bone on the marrow side of a fracture.
Fill in the blank(s) with the appropriate word(s).