13658664
Description
Flashcards by J yadonknow, updated more than 1 year ago
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Created by J yadonknow
almost 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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