In males, the hormone called ___________ stimulates the cells of Leydig
Fill in the blank(s) with correct word
LH (or luteinizing hormone)
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Which of the following statements is true regarding the yolk sac in human embryos?
A. It gives rise to the digestive tract. B. It is the source of the first blood cells. C. It allows for gas exchange. D. It allows for the passage of waste. E. It is the major source of nutrients for the embryo.
When shoveling snow from the driveway, the older man did not feel the bitter cold. Which action made his blood vessels get smaller in diameter, conserving heat in the warm core of his body?
A. Vasomotor B. Vasodilation C. Vasoconstriction D. Vasopressor
Which is not correct regarding nephrons?
A. The renal corpuscle may be located in the renal cortex or renal medulla. B. The nephron is the functional filtration unit in the kidney. C. The renal tubule is composed of the proximal convoluted tubule, nephron loop, and distal convoluted tubule. D. The renal corpuscle includes the glomerulus and the glomerular capsule. E. Eighty-five percent of nephrons are cortical nephrons.
What is a malignant tumor derived from epithelial tissue?
A. Lymphoma B. Carcinoma C. Melanoma D. Sarcoma E. Both "Carcinoma" and "Sarcoma" are correct.