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WorksheetsIntro to Muscle Physiology
Total questions: 25
Worksheet time: 14mins
The dense irregular connective tissue layer called the epimysium surrounding the entire muscle is at ____.
A
B
C
D
E
The muscle "fiber" or cell is at ____ and is surrounded by a connective tissue layer called _____.
A; epimysium
B; perimysium
C; epimysium
D; perimysium
E; endomysium
The lining at A surrounding this muscle "fiber" or cell is termed _____.
nucleus
sarcolemma
endomysium
myofibril
The name for the cell membrane of a muscle fiber is
sarcolemma
sarcoplasm
sarcomere
sarcoplasmic reticulum
The name for the cytoplasm of a muscle fiber is
sarcolemma
sarcomere
sarcoplasm
sarcoplasmic reticulum
The name for the smooth ER of a muscle fiber is
sarcomere
sarcoplasm
sarcoplasmic reticulum
sarcolemma
The thousands of densely packed, rodlike elements that make up a muscle fiber
myofibrils
nuclei
sarcomeres
actins and myosins
The striations seen in a muscle fiber are stripes formed from repeating series of dark and light bands along the length of each myofibril. The "dark" bands can be seen at _____.
A
B
C
D
E
As discussed in class, a sarcomere is the fundamental unit of muscle contraction, extending from one ______ to another.
A band
I band
M line
H zone
Z disc
The thin myofilament that extends across I band and partway in A band
actin
myosin
The thick myofilament that extends length of the A band
actin
myosin
A sarcomere is the distance between two ________.
A band
Z discs
I band
Myosin
The ________ contains only the actin filaments.
A band
Z discs
I band
Myosin
The thicker filaments are the ________ filaments.
actin
myosin
Both actin and myosin are found in the ________.
A band
Z discs
I band
Myosin
The myosin filaments are located in the ________.
A band
Z discs
I band
Myosin
Which of the following surrounds the individual muscle cell?
perimysium
endomysium
epimysium
fascicle
What is the functional unit of a skeletal muscle called?
a sarcomere
a myofilament
a myofibril
the sarcoplasmic reticulum
Muscle tissue has all of the following properties except ________.
secretion
contractility
extensibility
excitability
Which of the following statements is true?
Cardiac muscle cells have many nuclei.
Smooth muscle cells have T tubules.
Striated muscle cells are long and cylindrical with many nuclei.
Cardiac muscle cells are found in the heart and large blood vessels.
What is the most distinguishing characteristic of muscle tissue?
it is composed of multiple cells working together
the ability to respond to nervous stimulation
its cells' in ability to reproduce by mitosis
he ability to transform chemical energy into mechanical energy to move the body
Which type of muscle is multinucleated?
(a)
The end of the muscle that is attached to the part of the body in motion when a muscle contracts is called the
origin
insertion
Functions of muscle
Produce Movement
Maintain Posture
Stabilize Joints
Generate Heat
Reduce friction
Characteristics of Muscle
Excitability
Contractility
Extensibility
Elasticity
involuntary
