PHYSIOLOGY KNPE 125 EXAM WITH COMPLETE SOLUTIONS!!
Sensory Root
Afferent neurons enter the spinal cord
Interneurons
- Processing centre of the spinal cord
- Process afferent signals
Anterior Motor Neurons and Motor Root
Exit of efferent neurons from the spinal cord
Path of the spinal cord reflex
1. Afferent neuron enters via sensory root
2. Synapses with interneurons
3. Interneurons activate/inactivate efferent neurons
4. Efferent signal exits via motor root
3 Spinal cord reflexes
1. flexor reflex
2. Muscle stretch reflex
3. Golgi Tendon Reflex
Flexor Reflex
- The quick contraction of flexor muscles resulting in the withdrawal of a limb from an
injurious stimulus.
, - Afferent neurons synapses to interneurons and sends a signal via motor root
Muscle stretch reflex
Knee jerk reflex. Causes stretched. muscle to contract (quads) and antagonist muscle
to relax (hams). A stroke can cause spastic movements and loss of function
Golgi tendon reflex
Prevents damaging force to tendons by sensing change in muscle tension.
Life span
length of a persons life
Health span
how long we stay in good health from brith to death
Types of contractions
concentric (shortening), eccentric (elongating), isometric (not moving)
Length-tension relationship
optimal length of a muscle for generating most power where there are most interactions
of myosin and actin fibres
Other other size principle
maximal force is the amount of muscle/contractile units active. Bigger muscle = more
force
Sensory Root
Afferent neurons enter the spinal cord
Interneurons
- Processing centre of the spinal cord
- Process afferent signals
Anterior Motor Neurons and Motor Root
Exit of efferent neurons from the spinal cord
Path of the spinal cord reflex
1. Afferent neuron enters via sensory root
2. Synapses with interneurons
3. Interneurons activate/inactivate efferent neurons
4. Efferent signal exits via motor root
3 Spinal cord reflexes
1. flexor reflex
2. Muscle stretch reflex
3. Golgi Tendon Reflex
Flexor Reflex
- The quick contraction of flexor muscles resulting in the withdrawal of a limb from an
injurious stimulus.
, - Afferent neurons synapses to interneurons and sends a signal via motor root
Muscle stretch reflex
Knee jerk reflex. Causes stretched. muscle to contract (quads) and antagonist muscle
to relax (hams). A stroke can cause spastic movements and loss of function
Golgi tendon reflex
Prevents damaging force to tendons by sensing change in muscle tension.
Life span
length of a persons life
Health span
how long we stay in good health from brith to death
Types of contractions
concentric (shortening), eccentric (elongating), isometric (not moving)
Length-tension relationship
optimal length of a muscle for generating most power where there are most interactions
of myosin and actin fibres
Other other size principle
maximal force is the amount of muscle/contractile units active. Bigger muscle = more
force
