NEW
Font size
WorksheetsSarcomere Review
Total questions: 30
Worksheet time: 15mins
A muscle is wrapped in a(n) ____.
Epimysium
Perismysium
Endomysium
A fascicle is made of bundles of ____.
Muscles
Muscle cells
Myofibrils
The contractile unit of a muscle is the ____.
Fascicle
Muscle fiber
Sarcomere
Adjacent sarcomeres are separated by ____.
Z discs
M lines
Thick filaments
Thick filaments are made of a protein called ____.
Actin
Sarcolemma
Myosin
____ filaments attach to the Z discs at the ends of sarcomeres.
Thick
Thin
Label D refers to ____.
Z discs
Thick filaments
Sarcomeres
Thin filaments
Label B refers to a ____.
Z disc
Thick filament
Sarcomere
Thin filament
Label C refers to the ____.
Z disc
Thin filament
Sarcomere
M line
During contraction, ____ bind to and pull on thin filaments.
Tropomyosin
Thick filaments
Troponin
Z discs
During contraction, ____ is used to bend the myosin heads of the thick filaments.
Tropomyosin
M lines
Troponin
ATP
During contraction, the ____ of a sarcomere get closer together.
Tropomyosin
M lines
Z discs
Troponin
What is the area labeled 8
M line
Z line
H zone
A band
What is the area labeled 1
A band
Myofibril
Sarcomere
H zone
Item 3 is
Troponin
Myosin
Actin
Titin
What is the area labeled D?
Z line
H zone
I band
A band
What is the area labeled 10?
A band
H zone
I band
Zone of overlap
What happens to the H zone during a contraction?
It grows larger
It disappears
It stays the same length
What is the myosin anchored to?
M-line
Z-line
Actin
Thin filament
How many types of myofilaments make up the sarcomere?
1
2
4
8
Which part of the sarcomere contains only thick filaments?
I band
A band
H zone
Z zone
Which part of the sarcomere contains only thin filaments?
I band
A band
H zone
M zone
Which part of the sarcomere contains BOTH actin and myosin filaments?
I band
A band
H zone
M line
Which part of the sarcomere is the dark (striated) band?
I band
A band
H zone
Z line
Which part of the sarcomere is the light (striated) band?
I band
A band
H zone
Z line
Which myofilament pulls the other one when a muscle contracts?
Actin pulls the myosin
Myosin pulls the actin
When a muscle contracts, the actin and myosin stay the same length.
True
False
What happens to the I band when a sarcomere goes from relaxed to contracted?
It gets larger
It gets smaller
It doesn't change
What happens to the distance between Z lines when a sarcomere goes from relaxed to contracted?
It gets larger
It gets smaller
It doesn't change
What happens to the A band when a sarcomere goes from relaxed to contracted?
It gets larger
It gets smaller
It doesn't change
