For the biceps brachii, triceps brachii, and the quadriceps femoris, what is referred to by the prefixes "bi-", "tri-", and "quad-"?
A) The number of heads (origins)
B) The number of bones that are moved when the muscle contracts
C) The number of insertions
D) The number of aponeuroses bundling the muscles together

Question

Quizplus · Accepted Answer

The prefixes "bi-", "tri-", and "quad-" refer to the number of heads or points of origin of the muscles. Biceps brachii has two heads, triceps brachii has three, and quadriceps femoris has four.

For the Biceps Brachii, Triceps Brachii, and the Quadriceps Femoris