Bone cells called ________ break down bone by secreting hydrochloric acid and enzymes that dissolve the matrix.
A. osteoclasts
B. osteoid cells
C. osteocytes
D. osteoblasts
E. osteoprogenitor cells
Answer: A
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Which head of the quadriceps femoris extends the knee and flexes the thigh?
A. Vastus lateralis B. Vastus medialis C. Vastus intermedius D. Rectus femoris E. Biceps femoris
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Which of the following terms refers to fine hairs grown on the fetus?
A) intermediate B) vernix C) terminal D) lanugo E) vellus