KINE 433 Exam 2 2025 QUESTIONS AND
ANSWERS
What type(s) of muscle are controlled by the autonomic nervous system? - ANS smooth and
cardiac muscle
what type(s) of muscle are controlled by the central nervous system? - ANS skeletal muscle
what connects muscle to bone? - ANS tendons
what is the connective tissue that surrounds the entire muscle? - ANS epimysium
what is the connective tissue that surrounds an individual muscle fiber? - ANS endomysium
what is the connective tissue that surrounds a bundle of muscle fibers? - ANS perimysium
what is a bunch of muscle fibers called? - ANS fasciculus
what is the diameter range of a skeletal muscle fiber? - ANS 10-120 micrometers
VERY BIG! Human hair is 150 micrometers in diameter
1
what are two unique traits about muscle fibers? - ANS 1. they are much larger than most
Page
cells
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, 2. they are multi-nucleated and have many more nuclei than other cells
what part of the muscle cell produces ATP? - ANS mitochondria
what is the contractile element of a muscle cell composed of thick and thin fibers? -
ANS myofibril
what is the membrane surrounding a muscle fiber that conducts action potentials? -
ANS plasmalemma
what is the intracellular fluid containing glycogen and myoglobin called in a muscle cell? -
ANS sarcoplasm (cytoplasm)
what is the main storage unit for Ca++ in a muscle cell? - ANS sarcoplasmic reticulum
what is muscle contraction dependent on? - ANS Ca++
what are the extensions of the plasmalemma that transmit action potentials to individual fibers
called? - ANS transverse tubules
what is important about the transverse tubules? - ANS they are important for contraction,
because they allow the action potential to transmit THROUGH the cell
what is the sarcomere? - ANS the functional unit of a myofibril
(muscle cell)
where is the place in a muscle cell where thin and thick fibers can interact or overlap? -
2
ANS sarcomere
Page
@COPYRIGHT BRAINBARTER 2025/2026
ANSWERS
What type(s) of muscle are controlled by the autonomic nervous system? - ANS smooth and
cardiac muscle
what type(s) of muscle are controlled by the central nervous system? - ANS skeletal muscle
what connects muscle to bone? - ANS tendons
what is the connective tissue that surrounds the entire muscle? - ANS epimysium
what is the connective tissue that surrounds an individual muscle fiber? - ANS endomysium
what is the connective tissue that surrounds a bundle of muscle fibers? - ANS perimysium
what is a bunch of muscle fibers called? - ANS fasciculus
what is the diameter range of a skeletal muscle fiber? - ANS 10-120 micrometers
VERY BIG! Human hair is 150 micrometers in diameter
1
what are two unique traits about muscle fibers? - ANS 1. they are much larger than most
Page
cells
@COPYRIGHT BRAINBARTER 2025/2026
, 2. they are multi-nucleated and have many more nuclei than other cells
what part of the muscle cell produces ATP? - ANS mitochondria
what is the contractile element of a muscle cell composed of thick and thin fibers? -
ANS myofibril
what is the membrane surrounding a muscle fiber that conducts action potentials? -
ANS plasmalemma
what is the intracellular fluid containing glycogen and myoglobin called in a muscle cell? -
ANS sarcoplasm (cytoplasm)
what is the main storage unit for Ca++ in a muscle cell? - ANS sarcoplasmic reticulum
what is muscle contraction dependent on? - ANS Ca++
what are the extensions of the plasmalemma that transmit action potentials to individual fibers
called? - ANS transverse tubules
what is important about the transverse tubules? - ANS they are important for contraction,
because they allow the action potential to transmit THROUGH the cell
what is the sarcomere? - ANS the functional unit of a myofibril
(muscle cell)
where is the place in a muscle cell where thin and thick fibers can interact or overlap? -
2
ANS sarcomere
Page
@COPYRIGHT BRAINBARTER 2025/2026
