WorksheetsAnatomy: Muscle Contraction
Total questions: 20
Worksheet time: 10mins
__________ is attached to the Z line?
myosin
actin
thick filament
troponin
What is the contractile unit formed from Z line to Z line?
Sarcomere
T Tubule
Sarcoplasmic reticulum
Fascicle
____________ attaches to actin to form the cross bridge.
Troponin
Tropomyosin
Myosin
Calcium
The H zone changes size during a muscle contraction.
True
False
A sarcomere is labeled here as _______.
BD
BC
AE
AB
The Z line is labeled here as _______.
BD
AC
AE
AB
The myosin is labeled here as _______.
BD
AC
BC
AB
The actin is labeled here as _______.
AD
AC
BC
AB
Which of the following occur when ATP binds to the myosin head?
Myosin head change to low energy configuration
Myosin head undergoes power stroke
Myosin head detach from actin
Myosin head forms cross bridge
Which of the following refers to the muscle cell?
Myofibril
Myofilament
Fascicle
Muscle fiber
What is necessary for the myosin to release the actin?
ATP
Calcium
ADP
Sodium
What does the myosin do to the actin?
Nothing
Pushes on it
Pulls on it
Breaks it into pieces
When a muscle is in a contracted position, what is the relationship between actin filaments?
They are on top of one another
They are beside each other
They are close to each other
They are far apart from each other
When a muscle is relaxed and in a lengthened position, what is the relationship between actin filaments?
They are on top of one another
They are beside each other
They are close to each other
They are far apart from each other
The functional unit of the muscle cell is the:
Sarcomere
Myofilament
Osteon
Muscle fiber
