Which of the following vessels does not belong to the hepatic portal circulation?
A) inferior mesenteric vein B) splenic artery
C) gastroepiploic vein D) superior mesenteric vein
Answer: B
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Arteries have thinner walls than veins.
Answer the following statement true (T) or false (F)
The first line of cellular defense against pathogens are the
A) T cells. B) B cells. C) NK cells. D) phagocytes. E) plasma cells.
What is the main reason a patient with Parkinson disease cannot be treated with dopamine?
A. Acetylcholine is the main neurotransmitter that is deficient. B. Injecting dopamine only makes the substantia nigra down-regulate its own production of dopamine. C. Dopamine is highly addictive, creating a dependence in the patient that is worse than Parkinson disease. D. Dopamine cannot cross the blood-brain barrier, and it has too many systemic side effects. E. Dopamine is a protein that is digested in the stomach before it can enter a person's circulation.
In which region(s) of the GI tract do peristaltic contractions occur?
A. The esophagus B. The small intestine C. The stomach D. The large intestine E. All of these options are correct.