If the tubular maximum for a particular amino acid is 200 mg/100 ml and the concentration of that amino acid in the blood is 100 mg/100 ml, the amino acid
A. will be actively secreted into the filtrate.
B. will be completely reabsorbed by the tubule cells.
C. will appear in the urine.
D. will not appear in the urine.
E. None of these choices is correct.
B
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The uterine phase that develops because of a fall in progesterone levels is the
A) menstrual phase. B) proliferative phase. C) secretory phase. D) follicular phase. E) luteal phase.
Myelin is (a)
A) cell body. B) special cell that protects neurons. C) mostly lipid. D) special area of the brain. E) None of the answers are correct.
How many cells does the human body have?
A. 100 million B. 25 trillion C. 4 billion D. 75 trillion
Which tissues have little to no functional regenerative capacity?
a. cardiac muscle and nervous tissue in the brain and spinal cord b. epithelial tissue, bones, and areolar connective tissue c. cardiac and smooth muscle d. nervous tissue and smooth muscle