The bronchial arteries branch from the ________ to supply the lung airways
A) aortic arch
B) thoracic aorta
C) abdominal aorta
D) common carotid artery
E) intercostal arteries
Answer: B
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Which of the following arteries is the first branch of the abdominal aorta?
A) splenic artery B) superior mesenteric artery C) celiac trunk D) femoral artery E) hepatic artery
Presynaptic facilitation makes a pathway
A) less likely to be in use, just through hyperpolarization of selected neurons and capable of alteration, just through training and conditioning. B) more likely to be in use, just through depolarization of selected neurons and capable of alteration, just through training and conditioning. C) more likely to be in use, just through depolarization of selected neurons. D) less likely to be in use, just through hyperpolarization of selected neurons. E) capable of alteration, just through training and conditioning.
The human genome consists of approximately 3.2 billion base pairs. Protein-coding genes represent ________ of the total genome.
A) 25 B) 10 C) 2 D) 50 E) 99
The first heart sound
a. occurs when the AV valves close. b. occurs when the semilunar valves close. c. signals the onset of ventricular systole. d. occurs when the AV valves close and signals the onset of ventricular systole. e. occurs when the semilunar valves close and signals the onset of ventricular systole.