Which structure is the adult remnant of the umbilical vein?
A) Fossa ovalis
B) Ligamentum venosum
C) Ligamentum arteriosum
D) Ligamentum teres
Answer: D
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The ________ is responsible for controlling the normal rhythmic cycle of breathing.
A. pontine respiratory group B. hypothalamus C. ventral respiratory group D. dorsal respiratory group
Straight tubules originate at the seminiferous tubules and form a maze of passageways called the
A) afferent ducts. B) efferent ducts. C) ductus deferens. D) epididymis. E) rete testis
Hypothyroidism in adults causes ________.
A. myxedema B. Cushing's disease C. cretinism D. Graves' disease
All of the following proteins are part of the thin filaments except
A) actin. B) tropomyosin. C) troponin. D) titin. E) None of the answers is correct; there are no exceptions.