Imagine that a seven-year-old girl develops a hormone-secreting ovarian tumor derived from granulosa cells. What signs of the disease would you expect?
Granulosa cells produce estrogen, so a tumor involving these cells would lead to highly elevated levels of estrogen. Estrogen would set in motion the development of secondary sex characteristics, such as breast enlargement, deposition of fat in characteristic places, development of axillary and pubic hair and apocrine sweat glands, along with accelerated skeletal growth.
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Of the millions of sperm deposited into the vagina during intercourse, only a few hundred reach the secondary oocyte. What happens to the rest?
A. Some never become motile. B. They may become disoriented and lose direction. C. They may be destroyed by the acidic environment of the female tract. D. Many leak out of the vagina. E. All of the choices are correct.
The structure that produces a thick, yellowish fluid that contains fructose and composes about 60% of the seminal fluid volume is the:
a. seminal vesicles b. prostate gland c. bulbourethral glands d. seminiferous tubules
Some enzymes inside the rough ER may pass through the ER's membrane and be used within the cytosol, but most enzymes used in the cytosol are made at free ribsomes
Indicate whether the statement is true or false
What is the purpose of segmental contractions of the small intestine?
A. Propelling the chyme forward B. Stretching the intestinal wall C. Moving intestinal contents into the colon D. Mixing of intestinal contents