muscular system

Question 1

skeletal muscles

Answer 1

generate forces to cause movement or to counter external forces, has to attach to at least two bones

Question 2

muscle attachments

Answer 2

most skeletal muscles run form one bone to another, one bone moves while the other remains fixed

Question 3

origin (proximal) attachment

Answer 3

less movable

Question 4

insertion (distal) attachment

Answer 4

more movable

Question 5

direct attachements

Answer 5

short connective tissue fibers

Question 6

indirect attachments

Answer 6

connective tissue extends beyond ends of muscle fibers to form a cordlike tendon or a flat aponeurosis sheet (more common)

Question 7

isometric contraction

Answer 7

no change in muscle length, no movement = stabilize joints

Question 8

isotonic

Answer 8

muscles change length to produce movement (concentric and eccentric contraction)

Question 9

concentric contraction

Answer 9

shortens during movement, change in muscle length

Question 10

eccentric contraction

Answer 10

lengthens during movement, change in muscle length

Question 11

prime mover (agonist)

Answer 11

muscles primarily responsible for a movement

Question 12

antagonist

Answer 12

muscles perform the opposite movement to the agonist, antagonists help stabilize and control movement

Question 13

fixator

Answer 13

steadies the proximal parts of a limb while movements are occurring at distal parts

Question 14

synergist

Answer 14

compliments the action of the agonists (prime movers), counteracts unwanted movement, weaker than agonist & antagonist