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Created by J yadonknow
over 6 years ago
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Question | Answer |
Skin sensory endings (6) Na Na Me Me Pa Ru | Naked ending Hair follicle Merkel disc Meissner's Pacinian corpuscle Ruffini |
Naked | Pain, 'c |
Hair follicle | Hair movement |
Merkel disc | Sustained pressure (slow adaptive) |
Meissner's ending | Touch - rapid adapting |
Pacinian Corpuscle | Vibration |
Ruffini ending | Shear stress |
What separates the 1' sensory cortex and motor areas? | Central sulcus |
What is extrafusal muscle fibre innervated by? | alpha motor neuron |
What is intrafusal fibre innervated by? | gamma motor neuron |
What does activation of alpha cause? | Extrafusal muscle fibres to shorten |
What effect would this have on muscle spindle? | Cause the spindle to become slack, and no longer report length of muscle |
How do spindle fibres counteract this? | Activation of gamma motor neurons causes spindle poles to contract, keeping it active. |
What monitors stretch in tendons? | Golgi tendon organs |
What do joint receptors report? | When movement of joint is reach its max ROM |
Benefits of somatotopy | Helps keep order in sensory systems Makes organisation of synaptic connections more efficient |
Proprioception in insects | Hair plates Campaniform sensilla |
MOA | As femur travels upwards, hair plate brushes on coxa |
What sort of receptor does this act like? | Joint receptor |
What are Campaniform sensila? | Depressions w/ floor of thin cuticle |
What do Campaniform sensilla monitor? | Distortion of insect exoskeleton Oscillation in shapes of halteres |
Function of halteres | Act like gyroscopes during flight When insect turns this creates strain in shafts of halteres which is monitored by Campaniform sensilla |
What muscle mass do insects have for escape mechanisms? | Muscle receptor organ in abdomen |
What organs are used for detection of electric fields? | Ampullae of Lorenzini |
What types of electric fish exist? | 1. High voltage fish to stun prey 2. Weakly electric fish that generate a constant field for navigation and communication |
How do birds sense magnetic fields? | Theories include: 1. ElectroR 2. Magnetic crystals 3. Magnetic sense linked to vision |
Evidence for 3? | Only present when birds under full spectrum white light |
MOA | Magnetic frequencies alter the spin state of high energy electrons generated when photopigments absorb light energy |
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