A pituitary tumor interferes with FSH secretion. How would this affect a male?
A. There would be no effect as FSH is found only in females.
B. He would develop a feminine body contour.
C. He would produce too many sperm cells.
D. He would have an erection.
E. He would not produce sperm cells.
Answer: E
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After birth, the remnant of the umbilical vein becomes the
A. fossa ovalis. B. ligamentum arteriosum. C. ligamentum teres. D. ligamentum venosum. E. medial umbilical ligament.
Red blood cells with an internal osmolarity of 300 mOsM are placed in the following solutions. Designate each solution according to its osmolarity and tonicity, and explain what happens to the cells and why.
A. 200 mOsM NaCl B. 400 mOsM urea C. 100 mOsM urea plus 200 mOsM NaCl D. 300 mOsM urea E. 300 mOsM NaCl F. 200 mOsM urea plus 300 mOsM NaCl G. 400 mOsM NaCl
Which organ transports blood to the heart?
A) Pancreas B) Larynx C) Aorta D) Vena cava
The principal theory of how evolution works is called ________.
A. darwinian pressure B. natural pressure C. natural selection D. selective pressure E. natural adaptation