In the lower leg, the gastrocnemius muscle bends the foot away from the knee, as in pointing one's toes. The tibialis anterior muscle flexes the foot toward the knee. These two muscles are
A) synergistic.
B) homeostatic.
C) mutualistic.
D) antagonistic.
E) cooperative.
D
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A. bone marrow B. skin C. T cells D. lymphocytes
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A) chemical B) transport C) mechanical D) potential