Functional organization of the muscular system

Question 1

What are the 6 functions of skeletal muscle tissue

Answer 1

produce skeletal movement, maintain posture/body position, support soft tissues, guard body entrances and exits, maintain body temperature, provide nutrient reserves

Question 2

Axial muscles support and position the axial skeleton. They:

Answer 2

-arise on the axial skeleton
-position the head and vertebral column
-move the rib cage assisting in
movements that make breathing possible

Question 3

Appendicular muscles

stabilize and move the appendicular skeleton. They:

Answer 3

• arise on the axial or appendicular skeleton
• position the pectoral and pelvic girdles
• position and move the upper and lower extremities

Question 4

What is an origin

Answer 4

the place at which the fixed end of a muscle attaches
Typically, a muscle’s origin is proximal to its insertion when the body is in the anatomical position. Therefore, the origin can be referred to as the proximal attachment and the insertion as the distal attachment

Question 5

What is an insertion

Answer 5

The place at which the movable end of a muscle attachs

Question 6

What is an agonist

Answer 6

(primary mover) is a muscle that is primarily responsible for a movement at a joint.
Example: biceps brachii is the agonist producing flexion at the elbow

Question 7

What is a synergist

Answer 7

helps the agonist work efficiently by assisting in the action or by stabilizing the point of origin.
Example: brachioradialis assists in flexion and stabilizes the elbow joint

Question 8

What is an antagonist

Answer 8

muscle whose action opposes that of the agonist.
Example: triceps brachii is the antagonist of biceps brachii because it extends at the elbow, the action opposing the flexion at the elbow produced by biceps brachii