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WorksheetsIB SEHS 4.1 Neuromuscular
Total questions: 20
Worksheet time: 10mins
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
What part of the motor unit is responsible for carrying an impulse towards the cell body?
Axon
Dendrite
Motor end plate
Synapse
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 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
According to the sliding filament theory, which of the following change in length during isotonic muscle contraction?
I. A band
II. H Zone
III. Sarcomere
I and II only
I and III only
II and III only
I, II and III
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
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
In the sarcome, which of the following is the thick filament?
Actin
Z line
Myosin
M Line
Acetylcholine allows the muscle to relax
True
False
Who am I?
Fatigue rate - low
Contraction speed - low
Muscle fibre size - small
Force production - low
Slow oxidative fibres
Fast oxidative fibres
Fast glycolytic
Who am I?
Fatigue rate - medium (minutes)
Contraction speed - high
Muscle fibre size - medium
Force production - medium-high
Slow oxidative
Fast oxidative
Fast glycolytic
Who am I?
Fatigue rate - low (secs)
Contraction speed - high
Muscle fibre size - large
Force production - high
Type I
Type IIa
Type IIb
Low calcium concentrations myosin binding sites on actin are covered by tropomyosin?
True
False
The sarcoplasmic reticulum releases the neurotransmitter acetylcholine
True
False
Cross bridge formation is terminated when ADP and Pi are resynthesised to ATP?
True
False
Action potentials are electrical signals that tell muscle tissue to contract.
True
False
T tubules transport acetylcholine across the neuromuscular junction
True
False
