When the first heart sound is heard, what is occuring with the heart valves?
a. The AV valves are opening.
b. The AV valves are closing.
c. The semilunar valves are opening.
d. The semilunar valves are closing.
Answer: b. The AV valves are closing.
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In a gomphosis, the tooth is held in place by the ________ membrane.
Fill in the blank(s) with the appropriate word(s).
Which of the following tracts does NOT carry sensory stimuli?
a. Anterolateral system b. Corticospinal tracts c. Posterior columns d. Spinocerebellar tracts
The postganglionic parasympathetic fibers that are controlled by pelvic splanchnic nerves innervate the
a: Large intestine b: Reproductive organs c: Salivary glands d: Pupillary constrictor muscles e: Urinary bladder f: Ureters A. a, d, e B. b, c, e C. a, b, e, f D. c, d, f E. a, c
The ________ is a region of dense bone that surrounds and protects the membranous labyrinth
A) bony callus B) bony labyrinth C) membranous callus D) vestibule E) auditory ossicle