Why is the human digestive system unable to digest cellulose?
Why ?
Human digestive system lacks the enzyme to recognize the structure and break the bonds that hold this polysaccharide together.
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The number of sperm cells ejaculated at one time is about:
a. 100,000–200,000 b. 300 million–500 million c. 1 million–3 million d. 3 million–5 million
Which sequence is correct for plasma proteins, from greatest to lowest concentration? (Some items may have been omitted.)
a. gamma globulins, albumins, fibrinogen b. albumins, fibrinogen, globulins c. albumins, globins, fibrinogen d. globulins, fibrinogen, albumins e. None of the above.
Hyposecretion of growth hormone
A. Grave's disease B. Pituitary dwarfism C. Diabetes mellitus D. Acromegaly E. Addison's disease
The two thyroid hormones (TH) are T3 and T4. The "3" and "4" refer to number of
a. oxygen atoms. b. tyrosine amino acids. c. iron atoms. d. calcium atoms. e. iodine atoms.