The second heart sound is produced by the
a. opening of the AV valves
b. closing of the AV valves
c. opening of the semilunar valves
d. closing of the semilunar valves
e. blood rushing through the AV valves during diastole, creating a turbulent flow
D
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The head of the humerus articulates with the
A. greater tubercle. B. greater trochanter. C. trochlear notch. D. glenoid cavity. E. intertubercular sulcus.
Which of the following is true of the structures of the sympathetic chain?
A) About 8 percent of the axons of each spinal nerve are parasympathetic postganglionic fibers. B) Each chain contains about 3 cervical, 11 thoracic, 4 lumbar, and 4 sacral sympathetic ganglia. C) Preganglionic sympathetic neurons are located in the cervical and thoracic regions only. D) These nerves have white rami, but lack gray rami. E) None of the answers are correct.
The ________ joint is the simplest synovial joint and also the least mobile synovial joint
A. pivot B. plane C. hinge D. saddle E. suture
Which of the following statements is true of both bone and cartilage?
a. They both contain more intercellular matrix than cells. b. Both bone and cartilage cells are supplied with food and oxygen through canaliculi. c. Both bone and cartilage cells are located in lacunae. d. Both A and C are true.