Which of the following structures houses the spiral organ?
A. Stapes
B. Vestibule
C. Semicircular duct
D. Cochlea
E. Tympanic cavity
Answer: D
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Irritation of the digestive lining activates the ________ reflex, which reverses the pattern of movement of the smooth muscle in the walls of the stomach.
Fill in the blank(s) with the appropriate word(s).
Proteins that are mainly used inside the cell are synthesized
A. in the nucleus. B. on the rough ER. C. on cytoplasmic ribosomes. D. in the nucleoli.
Label I represents which structure(s)?
A) trachea
B) smallest bronchioles
C) bronchus
D) alveoli
E) bronchioles
Which of the following is NOT a possible route for neural crest cells?
A. Sensory ganglia B. Autonomic ganglion neurons C. Melanocytes D. Enteric nervous system neurons E. Adrenal cortex