Muscle Anatomy Quiz
Preview:
The I band within a skeletal muscle fiber is indicated by ________.
A. Label A
B. Label B
C. Label C
D. Label D
he A band within a myofibril is indicated by ________.
A. Label A
B. Label B
C. Label C
D. Label D
What is the name of the neurotransmitter released at a neuromuscular junction?
A. Calcium
B. Acetylcholine
C. Dopamine
D. Troponin
The epimysium is represented by ________.
A. Label B
B. Label D
C. Label A
D. Label C
The myofilament composed of actin is indicated by ________.
A. Label A
B. Label C
C. Label D
D. Label B
What is released from the sarcoplasmic reticulum?
A. Inorganic phosphate
B. ADP
C. Calcium
D. ATP
The Headlines read: The anatomy class killed Mr. Cobb! First emotionally, and then physically. It was a gruesome scene, because Mr. Cobb put up a pretty good fight with his trusty stapler and bones from the dismembered skeleton. Anyway, after they killed him, they threw his body out the window in defiance in the celebration of his death. After a few hours his lifeless body began to stiffen. What is going on with Mr. Cobb’s body?
A. tetanus
B. cramps
C. rigor mortis
D. lactic acid buildup
What is the name of the thick myofilaments?
A. Actin
B. Myosin
C. Myoglobin
D. Titan
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
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
Ca2+ will be released from the sarcoplasmic reticulum when
A. impulse reaches neuromuscular junction
B. impulse transmitted along T tubule
C. ATP binds to sarcoplasmic reticulum
D. acetyl choline binds to ligand gated ion channels
The plasma membrane of a skeletal muscle cell is called the ________.
A. myofilament
B. sarcoplasmic reticulum
C. sarcoplasm
D. sarcolemma
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 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
When a muscle contracts, it _______
A. gets longer
B. gets shorter
C. gets thinner
D. grows hair
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
A mitochondria’s role in muscle contraction is the production of…
A. Synthesis of ATP
B. Metabolism of ATP
C. Synthesis of Proteins
D. Metabolism of Worn out Proteins
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 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
The muscle fiber (cell) is indicated by ________.
A. Label C
B. Label B
C. Label A
D. Label D
During skeletal muscle contraction, to what do myosin heads bind?
A. the H zone
B. Z discs
C. actin filaments
D. myosin filaments
____________ attaches to actin to form the cross bridge.
A. Troponin
B. Tropomyosin
C. Myosin
D. Calcium
What organelle wraps and surrounds the myofibril and stores calcium?
A. sarcoplasmic reticulum
B. cross bridge
C. sarcomere
D. sarcolemma
Power stroke will occur when
A. ATP binds to myosin head
B. Myosin head releases ADP and Pi
C. Myosin head hydrolyse ATP
D. Myosin binds to actin
What is necessary for the myosin to release the actin?
A. ATP
B. Calcium
C. ADP
D. Sodium
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