Muscular System Intro

Question 1

Stable bone

Answer 1

Origin

Question 2

Origin moves while insertion is stable. Same joint motion

Answer 2

Reversal of muscle action

Question 3

Ability to respond to stimulus

Answer 3

Irritability

Question 4

Ability to shorten when muscle receives stimulation

Answer 4

Contractility

Question 5

Ability to stretch when force is applied

Answer 5

Extensibility

Question 6

Force built up within a muscle. Greatest at midpoint

Answer 6

Tension

Question 7

Distance from max elongation to max shortening

Answer 7

Excursion

Question 8

Point at which muscle cannot shorten any further

Answer 8

Active insufficiency

Question 9

Point at which muscle cannot be elongated any further

Answer 9

Passive insufficiency

Question 10

Muscle contracts producing force without changing length of muscle. No motion at joint

Answer 10

Isometric

Question 11

Muscle shortens and muscle attachments move toward each other

Answer 11

Concentric contraction

Question 12

Muscle attachments move further apart. Produces greater force. Used to decelerate motion

Answer 12

Eccentric contraction

Question 13

Resistance to limb varies but the speed stays the same. Fixed speed

Answer 13

Isokinetic

Question 14

Muscle/muscle group that causes motion

Answer 14

Agonist

Question 15

Muscle that performs opposite motion of agonist

Answer 15

Antagonist

Question 16

Agonist and antagonist contract at the same time. No movement. To limit motion

Answer 16

Co-contraction

Question 17

Muscle/group that supports a part and allows agonist to work more efficiently

Answer 17

Stabilizer

Question 18

Contracts to prevent unwanted motion. Allows for only one motion

Answer 18

Neutralizer

Question 19

Distal segment is fixed. Proximal is moving

Answer 19

Closed kinetic chain

Question 20

Distal segment is moving and proximal is stabilized

Answer 20

Open kinetic chain

Question 21

Movable bone. Usually distal

Answer 21

Insertion

Question 22

Tends to be longer and has greater ROM

Answer 22

Parallel

Question 23

Shorter but more numerous her given area

Answer 23

Oblique

Question 24

Long thin fibers running entire length of muscle

Answer 24

Strap

Question 25

Spindle-shaped. Most fibers runlength of muscle

Answer 25

Fusiform

Question 26

Four sided, usually flat, broad attachments at end

Answer 26

Rhomboidal

Question 27

Flat and fan shaped. Fibers radiating from narrow point.

Answer 27

Triangular

Question 28

Short fibers attaching diagonally. Side of feather

Answer 28

Unipennate

Question 29

Fibers attached at both sides of tendon. Full feather

Answer 29

Bipennate

Question 30

Many tendons with oblique feathers in between

Answer 30

Multipennate