Random Flashcards
Thermoreceptor
Activated by extreme temperature (A delta fibres)
Mechanoreceptor
Activated by intense pressure on skin (A Delta fibres)
Polymodal
Activated by high intensity mechanical chemical & thermal (both hot&cold) stimuli
2 types of nociceptor fibre
A delta = Fast, sharp pain myelinated
C fibres = Slow, dull aching pain unmyelinated
Dorsal column system
Fine touch, pressure, Proprioception (Body position)
Spinothalamic system
Pain, temperature and coarse touch
Receptors in the skin that are sensitive to various types of touch
Merkels disk, messengers corpuscle, ruffinls ending
Sensitive to pressure, vibration
Pacinian corpuscle
Sensitive to pain and temperature
Free nerve ending
C fibres can be what receptors
Chemical, Temperature, pressure
A delta fibres can be what receptors
Temperature and pressure
What receptor can be A beta fibre
Touch
Proprioceptors are what type of fibre
A Alpha
What does exercise training do to skeletal muscle
Increases size of muscle fibres
Increases ATP production
What does low-intensity aerobic exercise do to skeletal muscle
Increased mitochondria
Increased capillaries
What does endurance training do to skeletal muscles
Fast glycolytic fibres become fast-oxidative fibres (IIb-IIa)
First 3 steps of an action potential in neurons
Na channel opens - increases membrane potential
K channel opens - more Na goes in than potassium goes out so membrane potential still increases
Na channel becomes refractory allowing no more na in cells