A 55-year-old man who has alcoholic cirrhosis of the liver is brought to the emergency department because he has been vomiting blood for the past 2 hours. He has a 2-month history of abdominal distention, dilated veins over the anterior abdominal wall, and internal hemorrhoids. Which of the following veins is the most likely origin of the hematemesis?
A. Esophageal veins
B. Inferiormesentericveins
C. Paraumbilical veins
D. Superior mesenteric vein
E. Superior vena cava
Ans: A. Esophageal veins
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The organ that surrounds the urethra and produces an alkaline secretion is the
A) seminal gland (seminal vesicle). B) bulbo-urethral gland. C) prostate gland. D) preputial gland. E) Bartholin's gland.
Which of the following statements is true of graded potentials?
A) They travel over long distances. B) They have different amplitudes. C) They are typically found in axons. D) They travel without decrement.
Which of the following is true of a baserunner weighing 70 Newtons and a baserunner weighing 50 Newtons?
A. the centripetal force exerted on the heavier baserunner will be greater B. the heavier baserunner will not be able to run as fast around the bases, due to a greater centripetal force C. if the baserunners run at the same velocity around the bases, the heavier baserunner will have to lean in more towards the pitcher's mound due to a greater centripetal force D. all of the above are true