The muscular layer of blood vessels is the
A) tunica intima.
B) tunica externa.
C) tunica media.
D) tunica interna.
E) tunica adventitia.
C) tunica media.
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Which of the following statements concerning the uterine tube is true?
A. The outer layer of the tube is formed by the ampulla. B. The oocyte is moved along the tube by peristaltic contractions of the muscular layer. C. The opening of the uterine tube is the mesosalpinx. D. The portion of the uterine tube closest to the uterus is the infundibulum. E. Fimbria are associated with the lining of the tube.
Changes in blood pressure are detected by ________ in certain arteries.
A. mechanoreceptors B. chemoreceptors C. nociceptors D. proprioceptors E. thermoreceptors
What is the underlying mechanism that allows striated muscles to contract more rapidly when very little force is required?
A) The muscle is shortening so rapidly that some myosin heads are moved to their new position without actually generating any force. B) Fewer myosin heads actually attach to the actin, increasing the rate of shortening. C) Lighter loads stimulate only a very high speed, low tension isoform of myosin. D) Lighter loads stimulate a myosin isoform with a very long unitary displacement.
Surgical repair of bone is known as:
A) cranioplasty B) ostectomy C) osteoplasty D) costoplasty