Exam 1 Part 4 Gross structure of skeletal muscle

Question 1

The end of the muscle that attaches to more stationary part of the skeleton

Answer 1

Origin

Question 2

End attached to the portion of the skeleton which moves when the muscle contracts

Answer 2

Insertion

Question 3

Term for the flesh of the muscle which is surrounded by epimysium

Answer 3

Belly

Question 4

Connective tissue portion of the muscle (continuation of the epimysium) which attaches to the bone

Answer 4

Tendon

Question 5

Composed of collagen fibers

Answer 5

Tendons

Question 6

Load necessary to rupture a given material when pulled in the direction of its length and allows muscles to withstand considerable amounts of pressure

Answer 6

Tensile strength

Question 7

Besides giving muscles a strong tensile strength tendons also give muscles what other advantages:

Answer 7

• Improve leverage by concentrating the force of a muscle on a small area
• Economize space & maintain limb conformity
• Acts as damping tissue to absorb shock & limit potential damage to bone & muscle
• Flexible so they can bend at joints

Question 8

Collagen fibers will penetrate deeply into the _____ ____ portion of the bone and these penetrations of the collagen fibers into the bone are known as

Answer 8

Cortical portion of the bone; Sharpey’s fibers

Question 9

Severe traction injury occurs and a tendon tears and does not “pull out” of the bone but takes a piece of the bone with it is known as an:

Answer 9

Avulsion fracture