Which of the following is clinically significant as an ectopic pacemaker of the heart?
a. drinking several cups of caffeinated coffee
b. extrasystole contractions associated with angina pectoris
c. excessive smoking
d. anxiety
Answer: b. extrasystole contractions associated with angina pectoris
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How many globins (protein building blocks) are found in a single hemoglobin molecule?
A. 1 B. 2 C. 4 D. 6 E. 8
Doves and partridges are examples of __________________
Fill in the blank(s) with correct word
Identify the structures of the bony labyrinth
A) The bony labyrinth contains the semicircular ducts and semicircular canals. B) The bony labyrinth contains the utricle and saccule. C) The bony labyrinth contains the semicircular canals, vestibule, and cochlea. D) The bony labyrinth contains the malleus, incus, and stapes. E) The bony labyrinth contains the cochlear duct and the cochlea.
Which of the following definitions best describes the timbre of sounds?
A. loudness B. amplitude C. wave frequency D. resonance quality E. pitch