After birth, the remnant of the umbilical vein becomes the
A. fossa ovalis.
B. ligamentum arteriosum.
C. ligamentum teres.
D. ligamentum venosum.
E. medial umbilical ligament.
C
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Since insulin released from the pancreas is carried in the bloodstream to distant target cells, like muscle cells, it is considered to be a(n)
a) local hormone. b) circulating hormone. c) paracrine. d) autocrine. e) neurotransmitter.
Deep folds of both the mucosa and submucosa in the small intestine that increase surface are known as ________
A) circular folds (plicae circulares) B) microvilli C) haustra D) villi
The ability of the components of the integumentary system to respond to stress or trauma is independent of nervous or endocrine system control.
Answer the following statement true (T) or false (F)
A circular muscle band that contracts at an orifice is also known as a _______________
Fill in the blank with correct word.