Hydroxyurea treats sickle cell disease by
A) transfusing new blood.
B) activating production of hemoglobin normally produced only in a fetus.
C) removing sickled cells.
D) stimulating hematopoietic stem cells.
B
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Answer the following statements true (T) or false (F)
1. Skeletal muscle is also called striated muscle. 2. Smooth muscle is also called voluntary muscle. 3. Cardiac muscle is found in the heart. 4. Like skeletal muscles, cardiac muscles have striations. 5. Like skeletal muscles, cardiac muscles have intercalated disks.
Reflexes that control vital organs are classified as ________ reflexes.
Fill in the blank(s) with the appropriate word(s).
This structure binds to an amino acid and holds it in place on a ribosome until it is incorporated into a polypeptide chain during translation.
a) mRNA b) rRNA c) tRNA d) DNA
Which describes the skin's form and function?
A. Washable B. Indicator of health C. A barrier D. Self-renewing E. All of the choices are correct.