The conversion of pepsinogen into the active form, pepsin, requires:
A) vitamin B12. B) intrinsic factor. C) an acidic pH. D) alkaline mucus.
C) an acidic pH
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Which is not one of the four heads of the quadriceps femoris?
A. vastus lateralis B. vastus medialis C. vastus intermedius D. gracilis E. rectus femoris
A healthy human brain will continue to develop until the approximate age of ________.
A. 50 B. 60 C. 25 D. 35
The neurohypophysis or posterior lobe of the pituitary gland is not a true endocrine gland because ________.
A) it is strictly a part of the neural system and has little or nothing to do with hormonal release B) embryonically it was an endocrine tissue, but in the adult human it is no longer functional C) it is unable to function as an endocrine tissue because it is actually part of the neural system due to its location D) it is only a hormone storage area that receives hormones from the hypothalamus for release
Cholesterol functions in the body as an energy source, and furnishes molecular
components for the synthesis of various sex hormones. Indicate whether the statement is true or false