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KINE 433 EXAM 2 || WITH 100%
ERRORLESS ANSWERS.
Question : what type(s) of muscle are controlled by the
autonomic nervous system?
Correct answer: smooth and cardiac muscle
Question : what type(s) of muscle are controlled by the central
nervous system?
Correct answer: skeletal muscle
Question : what connects muscle to bone?
Correct answer: tendons
Question : what is the connective tissue that surrounds the entire
muscle?
Correct answer: epimysium
Question : what is the connective tissue that surrounds an
individual muscle fiber?
Correct answer: endomysium
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Question : what is the connective tissue that surrounds a bundle
of muscle fibers?
Correct answer: perimysium
Question : what is a bunch of muscle fibers called?
Correct answer: fasciculus
Question : what is the diameter range of a skeletal muscle fiber?
Correct answer: 10-120 micrometers
VERY BIG! Human hair is 150 micrometers in diameter
Question : what are two unique traits about muscle fibers?
Correct answer: 1. they are much larger than most cells
- they are multi-nucleated and have many more nuclei than
other cells
Question : what part of the muscle cell produces ATP?
Correct answer: mitochondria
Question : what is the contractile element of a muscle cell
composed of thick and thin fibers?
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Correct answer: myofibril
Question : what is the membrane surrounding a muscle fiber that
conducts action potentials?
Correct answer: plasmalemma
Question : what is the intracellular fluid containing glycogen
and myoglobin called in a muscle cell?
Correct answer: sarcoplasm (cytoplasm)
Question : what is the main storage unit for Ca++ in a muscle
cell?
Correct answer: sarcoplasmic reticulum
Question : what is muscle contraction dependent on?
Correct answer: Ca++
Question : what are the extensions of the plasmalemma that
transmit action potentials to individual fibers called?
Correct answer: transverse tubules
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Question : what is important about the transverse tubules?
Correct answer: they are important for contraction, because they
allow the action potential to transmit THROUGH the cell
Question : what is the sarcomere?
Correct answer: the functional unit of a myofibril
(muscle cell)
Question : where is the place in a muscle cell where thin and
thick fibers can interact or overlap?
Correct answer: sarcomere
Question : what are thick filaments?
Correct answer: composed of a protein called myosin and have
cross bridges (extensions)
Question : what are thin filaments?
Correct answer: composed of actin, tropomyosin, and troponin
Question : what band represents the overlap of thick and thin
filaments?