SESC 131 Neuromuscular & Respiratory Quiz

In the diagram of a motor unit, what is represented by the part labelled X?

• Axon

• Neuromuscular synapse

• Nucleus

• Dendrite

What is the name of the gap between two neurons?

• Synapse

• Dendrite

• Axon

• Cell body

Which of the following are parts of a motor unit?

• Dendrite, cell body, nucleus and axon

• Dendrite, cell body, tendon and muscle

• Dendrite, cell body, cartilage and axon

• Dendrite, cell body, ligament and muscle

What part of the motor unit is responsible for carrying an impulse towards the cell body?

• Axon

• Dendrite

• Motor end plate

• Synapse

What is the neurotransmitter involved in stimulating muscle contraction?

• Tropomysosin

• Acetylcholine

• Calcium ions

• Pyruvate

Which of the following statements is true about the sliding filament theory?

• During contraction the H zone remains the same length

• A cross-bridge is formed by troponin and tropomysin attaching to one another

• A nerve impulse causes an action potential to spread across the muscle

• ATP is released around the filaments, stimulating the muscle to contract

Which type of athlete would most likely have the largest proportion of type IIb muscle fibres in the gastrocnemius muscle?

• 1500m runner

• 800m runner

• 400m runner

• 200m runner

Which of the following outline the properties of a slow twitch (type I) muscle fibre?

• Myoglobin content - High, Anaerobic capacity - low

• Myoglobin content - High, Anaerobic capacity - high

• Myoglobin content - Low, Anaerobic capacity - high

• Myoglobin content - Low, Anaerobic capacity - low

Tags

NGSS.HS-LS2-3

Which is a characteristic of a slow twitch (type I) muscle fibre?

• High number of mitochondria

• Low capillary density

• High glycogen stores

• Low resistance to fatigue

Tags

NGSS.HS-LS2-3

In the sarcome, which of the following is the thick filament?

• Actin

• Z line

• Myosin

• M Line