Chapter 10 Part 2

Question 1

Fiber colors have different

Answer 1

physiological properties

Question 2

Red (dark)-

Answer 2

Highly vascular/rich in myoglobin; stores O2

Question 3

White (light)-

Answer 3

Less vascular/low myoglobin; contract rapidly/fatigue quicker

Question 4

Tonic/Twitch can sort by muscle ability to establish and

Answer 4

sustain generated forces

Question 5

(5) Tonic fibers:

Answer 5

Slow
contracting/produce low force
Sustains contrt. for long time
Postural support
Common in amph./rept.

Question 6

Twitch fibers:

Answer 6

Fast contrct., Rapid movem., Found in all verts.,2 Types:slow/fast

Question 7

Slow twitch fibers(red) take longer to reach

Answer 7

max force than fast twitch fibers (white)

Question 8

Differ in their resistance to fatigue during

Answer 8

sustained exercise

Question 9

Performance of a musc. depends on how it is attached to the bones of the

Answer 9

lever system

Question 10

Distal movem.-

Answer 10

strong movem, short sweeps

Question 11

Proximal attachment-

Answer 11

fast movem., longer sweeps

Question 12

Synergists-musc. that act together to produce

Answer 12

motion in same general direction; biceps brachii/brachialis

Question 13

Antagonists-musc. that produce

Answer 13

opposing motions; biceps/triceps brachii

Question 14

Origin-

Answer 14

fixed point of attachment

Question 15

Insertion-

Answer 15

moveable point of attachment

Question 16

Flexors-

Answer 16

bend 1 part relative to another about a joint; decr. ang. of joint

Question 17

Extensors-

Answer 17

straight. part; incr. ang. of joint

Question 18

Adductors-

Answer 18

draw limbs toward midline of body

Question 19

Abductors-

Answer 19

move limbs away from midline of body

Question 20

Levators-

Answer 20

close jaws

Question 21

Depressors-

Answer 21

opens jaws

Question 22

Protractors-

Answer 22

projection of part away from its base

Question 23

Retractors-

Answer 23

bring it back

Question 24

Rotators:

Answer 24

Supinators(sole up)
Pronators(sole down)

Question 25

Dilators-

Answer 25

open orifice

Question 26

Constrictors (sphincters)-

Answer 26

surround tubes or openings/close