Prcatice 2: Muscle Structure
Authored by Mae-Lee Terrell
Science
12th Grade
NGSS covered
Used 2+ times
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15 questions
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1.
MATCH QUESTION
1 min • 1 pt
Match these terms with the correct statement or definition.
Excitability
Ability to shorten with a force.
Extensibility
Ability to be stretched.
Contractility
The capacity to respond to a stimulus.
Elasticity
Ability to recoil to original resting length after being stretched.
2.
MATCH QUESTION
1 min • 1 pt
Match these terms with the correct statement or definition.
Muscle fiber
Connective tissue that surrounds muscle fasciculi.
Epimysium.
Connective tissue sheath that surrounds each skeletal muscle.
Muscle fasiculus
Single muscle cell; makes up muscle fasciculi.
Perimysium.
Muscle bundle.
Endomysium.
Connective tissue that surrounds a muscle fiber.
3.
MATCH QUESTION
1 min • 1 pt
Match the following.
Tropomyosin
Thread-like structure that extends from one end of the muscle
fiber to the other.
Troponin
Provide calcium binding sites on actin myofilaments.
Myofibril
Thin myofilament which resembles two minute strands of
pearls twisted together.
Actin
Thick myofilaments which resemble bundles of golf clubs.
Myosin
Covers and uncovers attachment sites for myosin on actin
myofilaments.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The basic structural and functional unit of the muscle is
the sarcomere.
myosin.
actin.
a muscle fiber.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Forms an attachment site for actin myofilaments; the end of the sarcomere.
troponin
cross-bridge
z-disk
myofibril
6.
MATCH QUESTION
1 min • 1 pt
Match the following.
Sarcolemma
Highly organized, smooth endoplasmic reticulum; contains
high concentrations of calcium.
Sarcoplasm
The cell membrane of a muscle fiber.
T tubules
Invaginations (indentions) of the sarcolemma that wrap around sarcomeres.
Sarcoplasmic reticulum
The cytoplasm of a muscle fiber.
7.
MATCH QUESTION
1 min • 1 pt
Match the numbered label with the term.
label 2
Epimysium
label 4
endomysium
label 1
perimysium
Tags
NGSS.HS-LS1-2
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