When defective erythrocytes are broken down,
A. they are removed from the blood by the lungs.
B. bilirubin is formed from the breakdown of hemoglobin.
C. their heme groups are converted into amino acids.
D. their iron is excreted into the small intestine.
E. their components cannot be recycled.
B
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Thick (myosin) and thin (actin) filaments together form ________.
Fill in the blank(s) with the appropriate word(s).
Where is the vomiting center located?
a. stomach b. esophagus c. pons d. medulla e. spinal ganglia
In spermatogenesis, the haploid result of meiosis I is called a ________.
A. spermatid B. sperm C. secondary spermatocyte D. primary spermatocyte E. spermatogonium
The period from when an action potential begins until another action potential could be initiated is known as the ________ period
A) depolarization B) absolute refractory C) relative refractory D) repolarization E) hyperpolarization