Bio 252 Midterm
Study online at https://quizlet.com/_7j6me0
1. fulcrum -a fixed point on which a lever rests or is supported and on which it pivots
-joints serve as fulcrum
2. effort the applied force (muscle contraction)
3. load the force of the object that is to be moved
4. how muscles Lever systems used during movements allow muscles, bones, and the joints
function with between bones to work together to generate motions in a way that maximizes
bones and joints either speed or force.
5. deltoid triangular shape
6. trapezius trapezoid shape
7. serratus saw-toothed shape
8. rhomboid diamond shaped
9. orbicularis circular shape
10. pectinate comb-shaped
11. Piriformis pear-shaped
12. platys flat
13. quadratus square, four-sided
14. gracilis slender
15. fascicle arrange- -The amount of power of a muscle can produce
ment is correlat- -The range of motion a muscle can produce
ed with
, Bio 252 Midterm
Study online at https://quizlet.com/_7j6me0
16. parallel fascicles parallel to longitudinal axis of muscle; terminate at either end of tendon
ex. sternohyoid muscle
17. fusiform fascicles nearly parallel to longitudinal axis of muscle; flat in tendons; muscle
tapers towards tendons
ex. digastric muscle
18. triangular fascicles spread over broad area converge at thick central tendon
ex. pectoralis major
19. multipennate fascicles attach obliquely from many directions to several tendons
ex. deltoid muscle
20. bipennate fascicles arranged on both sides of centreally positioned tendons
ex. rectus femoris
21. unipennate fascicles arranged on only one side of tendon
ex. extensor digitorum longus muscle
22. circular fascicles in concentric circular arrangements form sphincter muscles that enclose
an orifice (opening)
ex. orbicularis oculi
23. origin the attachment to the stationary bone
24. insertion the attachment to the moveable bone
25. first class lever EFL
ex. scissors
26. second class ELF
lever ex .wheelbarrow
27. Third class lever
Study online at https://quizlet.com/_7j6me0
1. fulcrum -a fixed point on which a lever rests or is supported and on which it pivots
-joints serve as fulcrum
2. effort the applied force (muscle contraction)
3. load the force of the object that is to be moved
4. how muscles Lever systems used during movements allow muscles, bones, and the joints
function with between bones to work together to generate motions in a way that maximizes
bones and joints either speed or force.
5. deltoid triangular shape
6. trapezius trapezoid shape
7. serratus saw-toothed shape
8. rhomboid diamond shaped
9. orbicularis circular shape
10. pectinate comb-shaped
11. Piriformis pear-shaped
12. platys flat
13. quadratus square, four-sided
14. gracilis slender
15. fascicle arrange- -The amount of power of a muscle can produce
ment is correlat- -The range of motion a muscle can produce
ed with
, Bio 252 Midterm
Study online at https://quizlet.com/_7j6me0
16. parallel fascicles parallel to longitudinal axis of muscle; terminate at either end of tendon
ex. sternohyoid muscle
17. fusiform fascicles nearly parallel to longitudinal axis of muscle; flat in tendons; muscle
tapers towards tendons
ex. digastric muscle
18. triangular fascicles spread over broad area converge at thick central tendon
ex. pectoralis major
19. multipennate fascicles attach obliquely from many directions to several tendons
ex. deltoid muscle
20. bipennate fascicles arranged on both sides of centreally positioned tendons
ex. rectus femoris
21. unipennate fascicles arranged on only one side of tendon
ex. extensor digitorum longus muscle
22. circular fascicles in concentric circular arrangements form sphincter muscles that enclose
an orifice (opening)
ex. orbicularis oculi
23. origin the attachment to the stationary bone
24. insertion the attachment to the moveable bone
25. first class lever EFL
ex. scissors
26. second class ELF
lever ex .wheelbarrow
27. Third class lever
