Which of the following is true of spongy bone?
A. Arrangement of the bony plates is completely random.
B. Nourishment is supplied through a central canal.
C. The spaces are filled with yellow marrow.
D. Lamellae are arranged in concentric circles in osteons.
E. Bone is arranged in plates called trabeculae.
Answer: E
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The blood supply to the superior surface of the muscular diaphragm is provided by the ________.
Fill in the blank(s) with the appropriate word(s).
Aldosterone stimulates ion pumps along the distal convoluted tubule (DCT), the collecting tubule, and the collecting duct, causing __________.
countercurrent multiplication a decrease in the concentration of the filtrate a reduction in the number of sodium ions lost in the urine an increase in the number of sodium ions lost in the urine
Secretion of potassium into the urine is
A) decreased by aldosterone. B) associated with the secretion of sodium from the distal tubules and collecting ducts. C) increased when the exchange pump binds H+. D) increased by aldosterone. E) None of the answers is correct.