What is a motor unit?

A. A single nerve cell
B. Involvement of multiple muscles for one movement
C. A single nerve cell and all the muscle cells it stimulates
D. Hundreds of nerve endings stimulating a group of muscles


Answer: C

Anatomy & Physiology

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Osteoclasts and osteoblasts that travel through or across the bone surface removing and replacing old bone matrix are collectively called a(n) ________.

A. basic multicellular unit B. osteogenic repair unit C. bone reformation unit D. osteon E. callus multicellular unit

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The ____________________ serve as the conducting portion of the respiratory system, and the ____________________ are the gas-exchanging portion

Fill in the blank(s) with correct word

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With three seconds left on the clock, Mia breaks free and scores the winning goal in her soccer game. Of the muscles listed, select the one with the primary action in extending the leg for kicking

A.   Biceps femoris B.   Semimembranosus C.   Sartorius D.   Quadriceps femoris E.   Tensor fasciae latae

Anatomy & Physiology