Muscle physiology practice quiz 1

Which type of muscle tissue is striated and voluntary?

• Cardiac muscle

• Skeletal muscle

• Smooth muscle

• Involuntary muscle

Which protein connects the Z-Disk to the myosin filament?

• Actin

• Myosin

• Titin

• Tropomyosin

What is the region of the sarcomere that contains only thick filaments?

• I-Band

• H-Band/Zone

• A-Band

• Z-Disc/Line

What separates individual sarcomeres?

• Z-Disc/Line

• M-Line

• H-Band/Zone

• A-Band

Which of the following is the midline of the sarcomere?

• Z-Disc

• M-Line

• H-Zone

• A-Band

The striation of muscles is due to:

• The arrangement of nuclei

• Overlapping thin and thick filaments

• The presence of T-tubules

• The distribution of mitochondria

What is a synapse?

• A muscle fiber

• A nerve

• Connection between 2 neurons or a neuron and a target cell.

• A neurotransmitter

What is the neuromuscular junction?

• The connection between two neurons

• The synapse between an axon terminal of a neuron and a muscle cell

• The gap between muscle fibers

• The area where muscle contraction occurs

What is the synaptic cleft?

• A muscle fiber

• A neuron

• The gap between two cells in a synapse

• The area within a sarcomere

What neurotransmitter is released by a terminal axon to deliver an action potential across the synaptic cleft?

• Norepinephrine

• Acetylcholine (Ach)

• Dopamine

• Serotonin