Which of the following delivers air to the lobes of the lungs?
A. Primary bronchi
B. Secondary bronchi
C. Tertiary bronchi
D. Terminal bronchioles
Answer: B. Secondary bronchi
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The most inferior portion of the sternum is called the
A) manubrium. B) body. C) xiphoid process. D) sternal angle. E) sternal groove.
Which sequence correctly traces the steps of DNA replication?
(1) Weak bonds between nitrogenous bases of the DNA are disrupted. (2) DNA strands unwind. (3) DNA polymerase binds to exposed nitrogenous bases. (4) Ligases link together short complementary chains of nucleotides. (5) Nitrogenous bases of the DNA strand attract complementary nucleotides. A) 1, 2, 3, 5, 4 B) 1, 2, 3, 4, 5 C) 5, 4, 3, 2, 1 D) 4, 2, 3, 1, 5 E) 1, 3, 5, 2, 4
Cerebrospinal fluid is manufactured in the __________ of the brain and serves to ______________.
A) subdural space, prevent infection B) cortex, protect the brain from injury C) ventricles, cushion and protect the brain D) subarachnoid space, oxygenate the brain
All of the veins listed are deep veins except
A) superior vena cava. B) internal jugular. C) cephalic. D) femoral. E) anterior tibial.