In response to high blood glucose, the pancreas releases insulin to enable glucose to enter body cells. When the blood glucose level returns to normal, insulin release stops. This is an example of regulation by
A. endocrine dysplasia.
B. negative feedback.
C. positive feedback.
D. neural regulation.
E. somatic regulation.
B
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A male bodybuilder starts taking injections of testosterone (an anabolic steroid on a daily basis. After three weeks, you expect to observe all of the following, except
A) increased sex drive. B) decreased levels of GnRH. C) decreased levels of LH and FSH. D) increased muscle mass. E) decreased nurse cell stimulation.
Collagen fibers impart tensile strength to our skin while ______ fibers allow for some stretch and contraction in the dermis during movement
Fill in the blank with correct word.
For a neuron at rest, the concentration gradient for sodium is such that there is a higher concentration of sodium
A. inside the cell. B. outside the cell.
Transcription and translation differ in that
A. transcription produces RNA and translation produces protein. B. transcription produces RNA and translation produces DNA. C. transcription produces protein and translation produces RNA. D. transcription produces DNA and translation produces RNA.