The structure that separates the cochlear duct from the scala tympani is the
A) tectorial membrane.
B) basilar membrane.
C) vestibular duct.
D) organ of Corti.
E) malleus.
B) basilar membrane.
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In a hypothetical rare genetic disease in which the ribosomes in some cells of the anterior pituitary are malformed. Which hormone, if any, would you expect missing from a patient with this disease?
A. Estrogen B. Oxytocin C. Anti-diuretic hormone D. Progesterone E. Thyroid hormone
Chromatin becomes organized into chromosomes during:
a. interphase b. prophase c. anaphase d. telophase
The enzyme lactase:
A. is involved directly in the digestion of proteins. B. is necessary for the breakdown of milk fats. C. is embedded in the luminal plasma membranes of intestinal epithelial cells. D. promotes the formation of and storage of bile by the gallbladder. E. is overproduced and released by secretory cells in the small intestine in the condition known as lactose intolerance.
In the male axis, negative feedback on LH secretion is limited to:
A. testosterone (T), DHT, and estradiol B. T and DHT C. DHT and estradiol D. T, DHT, and inhibin E. T