Muscle Anatomy Quiz
Preview:
What organelle wraps and surrounds the myofibril and stores calcium?
A. sarcoplasmic reticulum
B. cross bridge
C. sarcomere
D. sarcolemma
he A band within a myofibril is indicated by ________.
A. Label A
B. Label B
C. Label C
D. Label D
Which of the following is NOT a function of the muscular system?
A. stabilization of joints
B. generation of heat
C. maintenance of posture
D. blood cell formation
____________ attaches to actin to form the cross bridge.
A. Troponin
B. Tropomyosin
C. Myosin
D. Calcium
The mechanical force of contraction is generated by ________.
A. shortening of the thin filaments
B. the temporary disappearance of thin filaments
C. shortening of the thick filaments
D. a sliding of thin filaments past thick filaments
What is the name of the neurotransmitter released at a neuromuscular junction?
A. Calcium
B. Acetylcholine
C. Dopamine
D. Troponin
The I band within a skeletal muscle fiber is indicated by ________.
A. Label A
B. Label B
C. Label C
D. Label D
The gap between the axon terminal of a motor neuron and the sarcolemma of a skeletal muscle cell is called the ________.
A. synapse
B. sarcomere
C. cross bridge
D. motor unit
What is released by axon terminals into the synaptic cleft to stimulate a muscle to contract?
A. sodium ions
B. acetylcholine
C. actin
D. myosin heads
The H zone is represented by ________.
A. Label A
B. Label B
C. Label C
D. Label D
What is the name of the place where a nerve meets a muscle fiber
A. Nerve junction
B. Neuromuscular junction
C. Muscle junction
D. Crossbridge
Which is more true to cause muscle contraction?
A. Actin Pulls on the myosin
B. Myosin Pulls on the Titin
C. Myosin Pulls on Actin
D. Actin Pulls on Titin
What causes the muscle to stop contracting?
A. Lack of effort
B. Myosin-Heads fail to attach
C. Calcium Ions are pumped away
D. Muscle fibre tears
Skeletal Muscle contraction is initiated when the ________ sends a message to the muscle cell.
A. Muscle cell
B. Gland
C. Neuron
D. None of the above
What is released from the sarcoplasmic reticulum?
A. Inorganic phosphate
B. ADP
C. Calcium
D. ATP