Hormones are examples of ________ secretion.
A) exocrine
B) apocrine
C) endocrine
D) holocrine
E) merocrine
C) endocrine
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In the early twentieth century, people sometimes ingested radioactive substances in "health drinks" made with radium-enriched water. Why did they often develop bone cancer?
A. The radium leached bone mineral from the skeleton. B. The radium caused tumors in the digestive tract which then spread to the bone tissue. C. Bone tissue absorbs foreign elements from the blood and the radium directly affected bone cells. D. The radium caused lung cancer that then spread to the bone tissue. E. There is no evidence that the development of bone cancer was related to ingestion of radium.
The pharmaceutical drug RU-486 is sometimes used for medical abortions. RU-486 blocks progesterone production. It cannot cross from the mother's blood into the placenta. The drug loses most of its abortive properties after the 1st trimester. This is likely because after the 1st trimester, the ________ begins producing a sufficient supply of progesterone and estrogen.
Fill in the blank(s) with the appropriate word(s).
Addison's disease is usually due to an insufficient output of glucocorticoids only
Indicate whether the statement is true or false
The amount of potassium excreted by the kidneys is regulated mainly by
A) ADH. B) aldosterone. C) parathormone. D) atrial natriuretic peptides. E) glucocorticoids.