4/25/26, 11:50 AM Exam 3 Bio 168 EXAM fully solved & updated 2025-2026(latest version verified for accuracy) (Questions + Answers) Solved 100%…
Exam 3 Bio 168 EXAM fully solved & updated
2025-2026(latest version verified for accuracy)
(Questions + Answers) Solved 100% Correct!!
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Terms in this set (77)
Three types of muscular tissue -skeletal muscle
-cardiac muscle
-smooth muscle
Function of skeletal muscle -produce skeletal movement
-maintain body position/stability
-guard body openings
-maintain body temperature
What are the three connective tissue 3 sheaths of connective tissues organized as:
layers in the muscular system and
how are they organized? 1) epimysium (surrounds whole muscle)
2) perimysium (surrounds muscle bundles, contains
blood vessel and nerve supply)
3) endomysium (surrounds individual muscle cells)
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,4/25/26, 11:50 AM Exam 3 Bio 168 EXAM fully solved & updated 2025-2026(latest version verified for accuracy) (Questions + Answers) Solved 100%…
tendon or aponeurosis endomysium, perimysium, and epimysium come
together:
-at ends of muscles
-to form connective tissue attachment to bone
matrix
-i.e., tendon (bundle) or aponeurosis (sheet)
Characteristics of skeletal muscle -Long, become large, contain hundred of nuclei
fibers?
-L.M. of skeletal muscle fiber (muscle cells are
extremely elongated, cylindrical cells called
muscle fibers, surrounded by plasma membrane
called sarcolemma)
-E.M of skeletal muscle fiber
-The skeletal muscles are voluntary and striated
Sarcolemma -cell membrane of a muscle cell
-surrounds the sarcoplasm (cytoplasm of muscle
fiber)
-a change in transmembrane potential at the _______
begins contractions
myofibrils -threadlike structure longitudinally arranged
-they show cross striations, alternating dark (A)
bands and light (I) bands
-parallel to each other, gives muscle fiber a striated
appearance
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, 4/25/26, 11:50 AM Exam 3 Bio 168 EXAM fully solved & updated 2025-2026(latest version verified for accuracy) (Questions + Answers) Solved 100%…
myofilament two types:
1) thin actin
2) thick myosin
contractile proteins responsible for muscle
contraction
Sarcomere contractile unit of the muscle
structural unit of myofibrils
formed specially organized thin actin and thick
myosin myofilaments
structural components of z line: at 2 ends of sarcomere where the thin
sarcomeres filaments meet
I band: consists of only thin actin filaments
A band: consists of mainly myosin filaments and
overlapping actin filaments
H zone: consists of only thick myosin filaments
M line: consists of transverse filaments at midline of
sarcomere, where the thick filaments meet
https://quizlet.com/1172433283/exam-3-bio-168-exam-fully-solved-updated-2025-2026latest-version-verified-for-accuracy-questions-answers-solved-… 3/23
Exam 3 Bio 168 EXAM fully solved & updated
2025-2026(latest version verified for accuracy)
(Questions + Answers) Solved 100% Correct!!
Save Groups
Terms in this set (77)
Three types of muscular tissue -skeletal muscle
-cardiac muscle
-smooth muscle
Function of skeletal muscle -produce skeletal movement
-maintain body position/stability
-guard body openings
-maintain body temperature
What are the three connective tissue 3 sheaths of connective tissues organized as:
layers in the muscular system and
how are they organized? 1) epimysium (surrounds whole muscle)
2) perimysium (surrounds muscle bundles, contains
blood vessel and nerve supply)
3) endomysium (surrounds individual muscle cells)
https://quizlet.com/1172433283/exam-3-bio-168-exam-fully-solved-updated-2025-2026latest-version-verified-for-accuracy-questions-answers-solved-… 1/23
,4/25/26, 11:50 AM Exam 3 Bio 168 EXAM fully solved & updated 2025-2026(latest version verified for accuracy) (Questions + Answers) Solved 100%…
tendon or aponeurosis endomysium, perimysium, and epimysium come
together:
-at ends of muscles
-to form connective tissue attachment to bone
matrix
-i.e., tendon (bundle) or aponeurosis (sheet)
Characteristics of skeletal muscle -Long, become large, contain hundred of nuclei
fibers?
-L.M. of skeletal muscle fiber (muscle cells are
extremely elongated, cylindrical cells called
muscle fibers, surrounded by plasma membrane
called sarcolemma)
-E.M of skeletal muscle fiber
-The skeletal muscles are voluntary and striated
Sarcolemma -cell membrane of a muscle cell
-surrounds the sarcoplasm (cytoplasm of muscle
fiber)
-a change in transmembrane potential at the _______
begins contractions
myofibrils -threadlike structure longitudinally arranged
-they show cross striations, alternating dark (A)
bands and light (I) bands
-parallel to each other, gives muscle fiber a striated
appearance
https://quizlet.com/1172433283/exam-3-bio-168-exam-fully-solved-updated-2025-2026latest-version-verified-for-accuracy-questions-answers-solved-… 2/23
, 4/25/26, 11:50 AM Exam 3 Bio 168 EXAM fully solved & updated 2025-2026(latest version verified for accuracy) (Questions + Answers) Solved 100%…
myofilament two types:
1) thin actin
2) thick myosin
contractile proteins responsible for muscle
contraction
Sarcomere contractile unit of the muscle
structural unit of myofibrils
formed specially organized thin actin and thick
myosin myofilaments
structural components of z line: at 2 ends of sarcomere where the thin
sarcomeres filaments meet
I band: consists of only thin actin filaments
A band: consists of mainly myosin filaments and
overlapping actin filaments
H zone: consists of only thick myosin filaments
M line: consists of transverse filaments at midline of
sarcomere, where the thick filaments meet
https://quizlet.com/1172433283/exam-3-bio-168-exam-fully-solved-updated-2025-2026latest-version-verified-for-accuracy-questions-answers-solved-… 3/23
