Muscular P3

What are thick filaments composed of?

• Actin

• Myosin

• Troponin

• Tropomyosin

What is the role of ATPase enzymes in thick filaments?

• Store calcium

• Provide energy for contraction

• Bind to actin

• Release neurotransmitters

Where are thin filaments anchored?

• M line

• Z disc

• H zone

• A band

What is the sarcoplasmic reticulum specialized for?

• Protein synthesis

• Calcium storage and release

• Energy production

• Oxygen transport

What is the ability of muscle cells to receive and respond to a stimulus called?

• Contractility

• Extensibility

• Elasticity

• Irritability

What is the ability of muscle cells to be stretched called?

• Contractility

• Extensibility

• Elasticity

• Irritability

What must stimulate skeletal muscles for contraction?

• Sensory neuron

• Motor neuron

• Interneuron

• Glial cell

What is the neurotransmitter that stimulates skeletal muscle?

• Dopamine

• Serotonin

• Acetylcholine

• Norepinephrine

What is the association site of the axon terminal of the motor neuron and sarcolemma of a muscle called?

• Synaptic cleft

• Neuromuscular junction

• Motor end plate

• Myoneural junction

What is the gap between nerve and muscle filled with?

• Synovial fluid

• Interstitial fluid

• Blood plasma

• Cerebrospinal fluid