What happens to the heme when hemoglobin is broken down by the liver and spleen?
A. It is broken down to form iron.
B. It is secreted into bile.
C. It is broken down to iron and bilirubin.
D. It is considered a waste product and removed from the body.
Answer: C
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Which layer of the skin is composed mainly of dense irregular connective tissue containing collagen and elastic fibers?
a) Hypodermis b) Basement membrane c) Epidermis d) Dermis e) Subcutaneous (subQ) layer
Most cases of chronic renal failure are caused by:
A) systemic diseases such as diabetes. B) nephron deterioration due to aging. C) frequent lower urinary tract infections. D) nephron destruction due to medications.
Osteolysis is
A. the result of enzyme activity. B. the result of osteoclast activity. C. the release of calcium and phosphate from the matrix. D. demineralization due to hydrochloric acid activity. E. All of these answers are correct.
Binding of myosin to actin in skeletal muscle cells does not normally take place in the absence of Ca2+.
Answer the following statement true (T) or false (F)