1. Match the following: A band, I band, H zone a. Contains only thick filaments.

Question

1. Match the following: A band, I band, H zone a. Contains only thick filaments. b. Contains only thin filaments c. Contains both thin and thick filaments 2. The function of the titin protein is to A. stabilize the position of the contractile filaments B. pull Z lines together during contraction C. interact with actin during contraction D. release calcium during contraction. E. cover the myosin binding site on the actin molecule 3. Match the following terms to their description: Axon Terminal; Synaptic Vesicles; Synaptic Cleft, Motor End Plate; T Tubule; Sarcolemma; Terminal Cisternae & Sarcoplasmic Reticulum, Sarcomere a. Invaginations of the sarcolemma penetrating deep into the interior of the muscle cell. b. The space between the axon terminal and motor end plate. e. Structures within the axon terminal that contain the neurotransmitter acetylcholine. f. The contractile unit of the muscle cell that extends from one Z line to the next. g Structures within skeletal muscle cells that serve as reservoirs of calcium ions. h. A folded region of the sarcolemma at the neuromuscular junction.

Explanation / Answer

1.a.H zone

b.I band

c.A-band

2.a.stabilize the position of contractikr filaments

e.cover the myosin binding sites.

3.a.

b.synaptic cleft

e.synaptic vesicle

f.sarcolemma.

g.T tubules

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