KINE 433 Exam 2 2025 QUESTIONS AND ANSWERS

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KINE 433 Exam 2 2025 QUESTIONS AND ANSWERS

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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 what are two unique traits about muscle fibers? - ANS 1. they are much larger than most cells @COPYRIGHT BRAINBARTER 2025/2026 Page2 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? - ANS sarcome

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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

@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

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