Calcitonin is produced in the ________ gland.
Fill in the blank(s) with the appropriate word(s).
thyroid
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The hormone insulin enhances the transport of glucose into body cells. Its secretion is controlled by a negative feedback system between the concentration of glucose in the blood and the cells that secrete insulin. Which of the following statements is most likely to be correct?
A. An increase in blood glucose concentration will stimulate insulin secretion, which will in turn lower the blood glucose concentration. B. A decrease in blood glucose concentration will stimulate insulin secretion, which will in turn increase the blood glucose concentration. C. A decrease in blood glucose concentration will stimulate insulin secretion, which will in turn lower the blood glucose concentration still further. D. An increase in blood glucose concentration will stimulate insulin secretion, which will in turn increase the blood glucose concentration still further.
The tiny gaps between adjacent Schwann cells are called
A) neurillema. B) nodes of Ranvier. C) axolemma. D) terminals. E) vesicles.
The last fluid expelled from the urethra during ejaculation comes from the
A) prostate gland. B) bulbourethral gland. C) testes. D) seminal vesicles.
Which of the following combining forms refers to a structure within the kidney?
A. glomerul/o B. nephr/o C. ren/o D. cyst/o