Which is not correct regarding the development of the endocrine system?
A. The adrenal medulla develops from neural crest cells.
B. The hypophyseal pouch and neurohypophyseal bud combine to form the pituitary gland.
C. The thyroid gland initially forms as a mass that is part of the developing tongue.
D. The thyroid gland becomes functional by weeks 10?12 of development.
E. The adrenal cortex has portions derived from all three embryonic germ layers.
Answer: E
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A. Lumbricals B. Palmar interossei C. Abductor pollicis longus D. Dorsal interossei E. Adductor pollicis
Which of the following would normally be impossible to palpate on a living person?
A. The occipital condyles B. The zygomatic arch C. The mastoid process D. The supraorbital ridge E. The superior nuchal line
The parasympathetic nervous system decreases heart rate by:
A. releasing norepinephrine. B. opening sodium gates. C. closing sodium gates. D. opening potassium gates.
The viscosity of blood is ________ proportional to the number of erythrocytes and ________ proportional to the amount of fluid.
A. directly; indirectly B. indirectly; directly C. directly; directly D. indirectly; indirectly