Question

number of origins. when the term biceps, triceps, or quadriceps forms part of a muscle name, you can assume that the (1. ) has two, three, or four origins, respectively. for example, the biceps muscle of the arm has two heads, or origins, and the triceps muscle has three.
location of the muscles origin and (2. ). occasionally, muscles are named for their attachment sites. for example, the sternocleidomastoid muscle has its origin on the sternum (sterno) and clavicle (cleido) and inserts on the (3. ) process of the temporal bone.
shape of the muscle. some muscles have a distinctive shape that helps to identify them. for example, the (4. ) muscle is roughly triangular (deltoid means \triangular\).
action of the muscle. when muscles are named for their actions, terms such as flexor, extensor, and (5. ) appear in their names. for example, the adductor muscles of the thigh all bring about its adduction, and the extensor muscles of the wrist all extend the wrist.

o 1. deltoid 2. adductor 3. muscle 4. insertion 5. mastoid

o 1. adductor 2. muscle 3. insertion 4. mastoid 5. deltoid

o 1. mastoid 2. deltoid 3. adductor 4. muscle 5. insertion

o 1. insertion 2. mastoid 3. deltoid 4. adductor 5. muscle

o 1. muscle 2. insertion 3. mastoid 4. deltoid 5. adductor

Explanation:

1. Biceps, triceps, quadriceps refer to muscles with 2, 3, 4 origins respectively, so the first blank is "muscle".
2. Muscles are named based on origin and insertion, so the second blank is "insertion".
3. Sternocleidomastoid inserts on the mastoid process of the temporal bone, so the third blank is "mastoid".
4. The deltoid muscle is triangular - shaped, so the fourth blank is "deltoid".
5. Flexor, extensor, and adductor are terms related to muscle actions, so the fifth blank is "adductor".

Answer:

1. muscle 2. insertion 3. mastoid 4. deltoid 5. adductor