Skeletal & Muscular System

Identify the articulating bones at the shoulder joint.

• Clavicle - Radius - Humerus

• Ulna - Radius - Scapula

• Radius - Ulna - Humerus

• Scapula - Humerus - Clavicle

A synovial joint has common structural features that allow free movement to take place. Which of the following descriptions best describes the 'Joint Capsule'?

• Tough band of elastic tissue that connects bone to bone and stabilises the joint during movement.

• A fibrous sac with an inner synovial membrane that encloses and strengthens the joint and secretes synovial fluid.

• The lubricating liquid contained within the joint capsule that reduces friction.

• The smooth tissue which covers the surface of articulating bones and absorbs shock.

The following is the definition of which key term... 'The point of muscular attachment to a stationary bone which anchors and stays fixed during muscular contraction.'

• Agonist

• Insertion

• Fixator

• Origin

This type of muscle contraction is where the muscle contracts and lengthens producing tension. This helps to resist forces like gravity to control the movement.

• Isotonic

• Isometric

• Eccentric

• Concentric

Identify the correct axis for the following plane of movement... 'Frontal Plane'

• Frontal

• Sagittal

• Transverse

• Longitudinal

In which plane and axis do the following joint actions take place in... 'Plantarflexion and dorsiflexion'

• Transverse Plane - Longitudinal Axis

• Sagittal Plane - Transverse Axis

• Frontal Plane - Sagittal Axis

• Longitudinal Plane - Frontal Axis

The shoulder is a ball and socket joint. Identify which of the following joint actions are possible at a ball and socket joint.

• Flexion & Extension

• Plantar-flexion & Dorsi-flexion

• Adduction & Abduction

• Medial & Lateral Rotation

Muscle fibres have certain structural features that affect the amount of force they can generate and length of time they can contract for. Which muscle fibre type has the highest amount/density of mitochondria and myoglobin that allow the muscle fibres that can resist fatigue?

• Slow Oxidative (SO)

• Fast Oxidative Glycolytic (FOG)

• Fast Glycolytic (FG)

Which muscle fibre type has the largest phosphocreatine store and a high amount of muscle fibres per neuron? Which means it can generate a large force in contraction but has a low fatugue resistance.

• Slow Oxidative (SO)

• Fast Oxidative Glycolytic (FOG)

• Fast Glycolytic (FG)

Motor units are the structures that link our CNS to our muscular system and allow neural signals to be turned into muscle contractions.

Which neurotransmitter is secreted into the synaptic cleft to conduct the nerve impulse across the gap between the axon and the muscle fibre?

• Sodium

• Potassium

• ATP

• Acetylcholine