Muscle Types and Their Functions

What is the primary function of skeletal muscle?

• To facilitate body movement

• To aid in digestion

• To line hollow organs

• To regulate blood flow

What are the structural units within a skeletal muscle cell called?

• Myofibrils

• Dense bodies

• Gap junctions

• Neurons

How are the filaments arranged in skeletal muscle?

• Randomly scattered

• In a zigzag pattern

• In parallel lines

• In a circular pattern

What is a sarcomere?

• A type of smooth muscle

• A contractile subunit of skeletal muscle

• A neurotransmitter

• A type of neuron

What is a key difference between skeletal and smooth muscle?

• Skeletal muscle is involuntary

• Smooth muscle has striations

• Skeletal muscle is striated

• Smooth muscle is attached to bones

Where is smooth muscle commonly found?

• In the skin

• In the brain

• Lining hollow organs

• Attached to bones

How is smooth muscle contraction controlled?

• Consciously

• By the autonomic nervous system

• By voluntary neurons

• Through direct brain signals

What process does smooth muscle aid in within the gastrointestinal tract?

• Circulation

• Digestion

• Peristalsis

• Respiration

What neurotransmitter is involved in smooth muscle contraction?

• Serotonin

• GABA

• Dopamine

• Acetylcholine

What additional component is required for smooth muscle contraction besides calcium?

• Hemoglobin

• Collagen

• Calmodulin

• Myoglobin