When do motor neurons switch from being upper motor neurons to lower motor neurons?
As they pass the C1 vertebrae
At the Dorsal Horn of the spinal cord
At the Ventral Horn of the spinal cord
Which type of motor neurons innervate the bulk of fibres within a muscle responsible for contractile force?
Alpha Motor Neurons
Delta Motor Neurons
Gamma Motor Neurons
Which type of motor neuron innervates a sensory organ within the muscle responsible for reacting to muscle stretch?
Alpha Motor Neuron
Delta Motor Neuron
Gamma Motor Neuron
The sensory organ within a muscle that detects changes to muscle length and responds to stretch is called the muscle
Muscles that work together to perform a function are called ... E.g. Biceps brachii and brachialis working together to perform flexion of the forearm
Synergistic Muscles
Synchronous Muscles
Synovial Muscles
An α-motor neuron and all of the skeletal muscle fibres that it innervates are collectively known as a
The collection of α-motor neurons that innervate a muscle is called a motor neuron
A single action potential in an α-motor neuron causes a muscle fibre to ''
Sustained contraction of a muscle due to action potentials being fired at a very high rate is known as
Match the skeletal muscle fibre type to its description: ❌: ATP derived from oxidative phosphorylation. Slow contraction and relaxation. Fatigue Resistant. ❌: ATP derived from oxidative phosphorylation. Fast contraction and relaxation. Fatigue Resistant. ❌: ATP derived from glycolysis. Rapid contraction but not fatigue resistant.
Of the different types of skeletal muscle fibres, which is pale/white in colour
Type I
Type IIa
Type IIb
When a skeletal muscle is pulled, the muscle spindles inside that muscle react causing the muscle to resist stretch by pulling back. This is called the reflex.
Intrafusal Extrafusal Parafusal( Intrafusal, Extrafusal, Parafusal ) skeletal muscle fibres are found in the muscle spindle and are innervated by gamma alpha delta( gamma, alpha, delta ) motor neurons
At the junction of muscle and tendon, in series with extrafusal fibres, lie small 'organs' which monitor changes in muscle tension. These small 'organs' are called Organs
What is the function of Golgi Tendon Organs?
To assist and amplify the myotatic reflex
To bring about muscle relaxation in response to extreme muscle tension
To send 'help' signals to synergistic muscles in times of extreme muscle tension
