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PHYL 1001 - Final Exam Questions and
Correct Answers/ Latest Update / Already
Graded
What is type of movement is controlled by skeletal muscle?
Ans: Voluntary Movement
What is controlled by smooth muscle?
Ans: Involuntary movements of the internal organs
What is controlled by cardiac muscle?
Ans: Responsible for heart contractions
What muscle types are striated?
Ans: Both skeletal and cardiac
What muscle types are not striated?
Ans: Smooth muscle
What are two names for muscle cells?
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Ans: Muscle fibers and myofiber
What is a skeletal muscle composed of?
Ans: Several muscle fibers, nerves, blood vessels, and
connective tissue
What is a muscle fascicle?
Ans: bundle of muscle fibers
What structure causes the striated appearance of skeletal muscles?
Ans: Sarcomeres
What function is achieved by sarcomeres?
Ans: Muscle contraction
Scarcolemma
Ans: plasma membrane of a muscle fiber
Sacroplasm
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Ans: cytoplasm of a muscle cell
sarcoplasmic reticulum
Ans: Organelle of the muscle fiber that stores calcium.
Do skeletal muscles contain mitochondria? In what quantities?
Ans: Yes, it contains many mitochondria
What are the two myofilaments?
Ans: actin (thin) and myosin (thick)
How does muscle contraction influence Z disc location?
Ans: Muscle contraction brings z discs closer together
What is the role of titin?
Ans: stability of z discs/M-line and elasticity
What is the M line?
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Ans: supporting proteins that hold the thick filaments together
in the H zone
What two things bind myosin?
Ans: ATP and actin
What two proteins are associated with actin?
Ans: troponin and tropomyosin
What is the role of tropomyosin in skeletal muscles?
Ans: covers actin preventing myosin binding and therefore
muscle contraction at rest
What is the role of troponin?
Ans: Binds to calcium to expose active sites on thin filaments
What three things does troponin bind to allow muscle contraction?
Ans: It must bind calcium, actin, and tropomyosin. This causes
a conformational change in troponin which exposes actin
binding sites for myosin.
All rights reserved © 2025/ 2026 |
PHYL 1001 - Final Exam Questions and
Correct Answers/ Latest Update / Already
Graded
What is type of movement is controlled by skeletal muscle?
Ans: Voluntary Movement
What is controlled by smooth muscle?
Ans: Involuntary movements of the internal organs
What is controlled by cardiac muscle?
Ans: Responsible for heart contractions
What muscle types are striated?
Ans: Both skeletal and cardiac
What muscle types are not striated?
Ans: Smooth muscle
What are two names for muscle cells?
All rights reserved © 2025/ 2026 |
, Page |2
Ans: Muscle fibers and myofiber
What is a skeletal muscle composed of?
Ans: Several muscle fibers, nerves, blood vessels, and
connective tissue
What is a muscle fascicle?
Ans: bundle of muscle fibers
What structure causes the striated appearance of skeletal muscles?
Ans: Sarcomeres
What function is achieved by sarcomeres?
Ans: Muscle contraction
Scarcolemma
Ans: plasma membrane of a muscle fiber
Sacroplasm
All rights reserved © 2025/ 2026 |
, Page |3
Ans: cytoplasm of a muscle cell
sarcoplasmic reticulum
Ans: Organelle of the muscle fiber that stores calcium.
Do skeletal muscles contain mitochondria? In what quantities?
Ans: Yes, it contains many mitochondria
What are the two myofilaments?
Ans: actin (thin) and myosin (thick)
How does muscle contraction influence Z disc location?
Ans: Muscle contraction brings z discs closer together
What is the role of titin?
Ans: stability of z discs/M-line and elasticity
What is the M line?
All rights reserved © 2025/ 2026 |
, Page |4
Ans: supporting proteins that hold the thick filaments together
in the H zone
What two things bind myosin?
Ans: ATP and actin
What two proteins are associated with actin?
Ans: troponin and tropomyosin
What is the role of tropomyosin in skeletal muscles?
Ans: covers actin preventing myosin binding and therefore
muscle contraction at rest
What is the role of troponin?
Ans: Binds to calcium to expose active sites on thin filaments
What three things does troponin bind to allow muscle contraction?
Ans: It must bind calcium, actin, and tropomyosin. This causes
a conformational change in troponin which exposes actin
binding sites for myosin.
All rights reserved © 2025/ 2026 |
