The tonsils are composed of
A. lymphatic nodules.
B. Peyer's patches.
C. stem cells.
Answer: A
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The function of the atrioventricular node is to
a. excite the left and right atrium b. control the heart rate c. prevent the atria and ventricles from contracting simultaneously d. repolarize the heart after systole e. stimulate ventricular contractile cells directly
Most if not all of a zygote's chromosomes come from the
A. ovum. B. sperm.
If you are unable to orotracheally intubate a patient due to massive maxillofacial trauma and severe oropharyngeal and nasopharyngeal bleeding, you would MOST likely have to perform:
A) nasotracheal intubation. B) a needle or surgical cricothyrotomy. C) pharmacologically assisted intubation. D) digital (tactile) intubation.
Which ion causes depolarization in olfactory neurons?
A. Na+ B. K+ C. Ca2+ D. Both Na+ and K+ are correct. E. Both Na+ and Ca2+ are correct.