The pectinate line of the anal canal:
A) denotes the separation of the external and internal sphincter ani muscles.
B) denotes the separation between the rectal and anal mucosa.
C) separates the part of the anal canal that is sensitive to laceration from the part that is not.
D) separates the part of the anal canal that is innervated by sympathetic fibers from that innervated by parasympathetic fibers.
E) indicates the anorectal junction.
Ans: C
You might also like to view...
Which of the following cell types is diploid?
A. Primary spermatocyte B. Secondary spermatocyte C. Sperm cell D. Spermatid
Pernicious anemia develops from a deficiency of
a. ATP b. carbonic anhydrase c. cobalt d. erythropoietin e. intrinsic factor
Angiotensin II causes a(n)
A. stimulation of the thirst center and increased release of ADH. B. stimulation of the thirst center and decreased release of ADH. C. inhibition of the thirst center and increased release of ADH. D. inhibition of the thirst center and decreased release of ADH.
The mRNA sequence that is complementary to the sequence UAG on a tRNA is
A) ATC. B) TUC. C) UAG. D) AUC. E) ACU.