BIO 201 EXAM 3 WITH ALL QUESTIONS AND ANSWER
2025
1. What composes the muscular system? ANS >> Skeletal muscles only
2. What is the study of the muscular system called? ANS >> Myology
3. What are the 4 functions of muscles? ANS >> 1. Movement
2. Stability
3. Control of body openings and passages
4. Heat production
4. Muscular movements also serve various roles in . ANS >>
Commu- nication
5. Describe stability. ANS >> Prevents unwanted movements, there are some
muscles known as the antigravity muscles that fight against gravity that help us
not fall over or slump.
6. What percent of body heat is produced by skeletal muscles? ANS >> 85%
7. What is the endomysium layer? ANS >> Thin sleeve of loose connective
tissue that surrounds each muscle fiber.
8. The endomysium layer provides room for two things, what are they?
ANS >> 1. Blood capillaries
2. Nerve fibers
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, 9. The endomysium also provides an environ-
ment for the muscle fiber. ANS >> extracellular chemical
10. Relate the endomysium tissue and excitation. ANS >> Excitation of the
muscle fiber depends on exchange of calcium, sodium, and potassium ions
across the endomysial tissue and the nerve end.
11. What is the perimysium layer? ANS >> Thicker connective tissue sheath that
wraps muscle fibers together in bundles called fassicles.
12. What are fassicles? ANS >> Bundles of muscle fibers together
13. Are fassicles visible to the naked eye, and if so what do they look like? ANS
>> Yes fassicles are visible to the naked eye, and they appear as parallel strands.
14. What does the perimysium carry? ANS >> Larger blood vessels, larger
nerves, and muscle spindles
15. What is the epimysium layer? ANS >> The fibrous sheath that surrounds the
entire muscle
16. What is the fascia? ANS >> Sheet of connective tissue that separates
neighboring muscles or muscle groups from each other and from the
subcutaneous tissue.
17. What are the two types of muscle attachments? ANS >> 1. Indirect
2. Direct
18. What is an indirect attachment? ANS >> The muscle ends short of its bony
destination and the gap is bridged by a tendon.
19. What is a tendon? ANS >> Fibrous band or sheet
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, 20. What is direct attachment? ANS >> There is so little separation between
muscle and bone that to the naked eye, the red muscular tissue seems to emerge
directly from the bone.
21. What is the origin? ANS >> The bony site of attachment at the relatively stationar
end.
22. What is the insertion? ANS >> Attachment site at its more mobile end
23. What is the belly? ANS >> The thicker middle region between the origin and
insertion.
24. What is the prime mover (agonist)? ANS >> The muscle that produces most
of the force during a particular joint action.
25. What is the synergist? ANS >> Muscle that aids the prime mover.
26. What is the antagonist? ANS >> A muscle that opposes the prime mover,
limits the speed or range of the prime mover.
27. What is a fixator? ANS >> A muscle that prevents a bone from moving.
28. What is an intrinsic muscle? ANS >> Is entirely contained within a particular
region, having both its origin and insertion there.
29. What is an extrinsic muscle? ANS >> Acts upon a designated region but it's
origin is elsewhere.
Example ANS >> Some movements in the fingers are produced in the forearm
(Extrinsic muscles)
30. What is innervation of a muscle? ANS >> Refers to the identity of the nerve
that it stimulates.
31. The muscles are innervated by two groups of muscles, what are they?
ANS >> 1. Spinal nerves
https://www.stuvia.com/user/Mboffin
2025
1. What composes the muscular system? ANS >> Skeletal muscles only
2. What is the study of the muscular system called? ANS >> Myology
3. What are the 4 functions of muscles? ANS >> 1. Movement
2. Stability
3. Control of body openings and passages
4. Heat production
4. Muscular movements also serve various roles in . ANS >>
Commu- nication
5. Describe stability. ANS >> Prevents unwanted movements, there are some
muscles known as the antigravity muscles that fight against gravity that help us
not fall over or slump.
6. What percent of body heat is produced by skeletal muscles? ANS >> 85%
7. What is the endomysium layer? ANS >> Thin sleeve of loose connective
tissue that surrounds each muscle fiber.
8. The endomysium layer provides room for two things, what are they?
ANS >> 1. Blood capillaries
2. Nerve fibers
https://www.stuvia.com/user/Mboffin
, 9. The endomysium also provides an environ-
ment for the muscle fiber. ANS >> extracellular chemical
10. Relate the endomysium tissue and excitation. ANS >> Excitation of the
muscle fiber depends on exchange of calcium, sodium, and potassium ions
across the endomysial tissue and the nerve end.
11. What is the perimysium layer? ANS >> Thicker connective tissue sheath that
wraps muscle fibers together in bundles called fassicles.
12. What are fassicles? ANS >> Bundles of muscle fibers together
13. Are fassicles visible to the naked eye, and if so what do they look like? ANS
>> Yes fassicles are visible to the naked eye, and they appear as parallel strands.
14. What does the perimysium carry? ANS >> Larger blood vessels, larger
nerves, and muscle spindles
15. What is the epimysium layer? ANS >> The fibrous sheath that surrounds the
entire muscle
16. What is the fascia? ANS >> Sheet of connective tissue that separates
neighboring muscles or muscle groups from each other and from the
subcutaneous tissue.
17. What are the two types of muscle attachments? ANS >> 1. Indirect
2. Direct
18. What is an indirect attachment? ANS >> The muscle ends short of its bony
destination and the gap is bridged by a tendon.
19. What is a tendon? ANS >> Fibrous band or sheet
https://www.stuvia.com/user/Mboffin
, 20. What is direct attachment? ANS >> There is so little separation between
muscle and bone that to the naked eye, the red muscular tissue seems to emerge
directly from the bone.
21. What is the origin? ANS >> The bony site of attachment at the relatively stationar
end.
22. What is the insertion? ANS >> Attachment site at its more mobile end
23. What is the belly? ANS >> The thicker middle region between the origin and
insertion.
24. What is the prime mover (agonist)? ANS >> The muscle that produces most
of the force during a particular joint action.
25. What is the synergist? ANS >> Muscle that aids the prime mover.
26. What is the antagonist? ANS >> A muscle that opposes the prime mover,
limits the speed or range of the prime mover.
27. What is a fixator? ANS >> A muscle that prevents a bone from moving.
28. What is an intrinsic muscle? ANS >> Is entirely contained within a particular
region, having both its origin and insertion there.
29. What is an extrinsic muscle? ANS >> Acts upon a designated region but it's
origin is elsewhere.
Example ANS >> Some movements in the fingers are produced in the forearm
(Extrinsic muscles)
30. What is innervation of a muscle? ANS >> Refers to the identity of the nerve
that it stimulates.
31. The muscles are innervated by two groups of muscles, what are they?
ANS >> 1. Spinal nerves
https://www.stuvia.com/user/Mboffin
