The contractile unit of a muscle is the ____

a. sarcomere
b. myosin head
c. phosphate group
d. myofibril
e. actin filaments


ANSWER: a

Biology & Microbiology

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a. GnRH>>LH>>FSH>>testosterone b. FSH>>LH>>GnRH>>testosterone c. GnRH>>FSH>>LH>>testosterone d. LH>>FSH>>GnRH>>testosterone e. LH>>FSH>>GnRH>>testosterone

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Do arteries always carry highly oxygenated blood? Explain your answer. What will be an ideal response?

Biology & Microbiology