SENSORY RECEPTORS AND CODING Flashcards
بسم الله الرحمن الرحيم
“ وقل رب ادخلني مدخل صدق واخرجني مخرج صدق واجعل لي من لدنك سلطانا نصيرا”
عرف المستقبلات الحسية
هي تراكيب مميزة بتوجد عند أطراف ال
afferent nerves
بتحس بتغيرات البيئة وتوصلها للجهاز العصبي المركزي
سواء كانت
Modified nerve endings or direct transmission
Modified cell ( like nurotransmission)
ايه وظايف المستقبلات الحسية ؟
Detectors : لاي محفز في البيئة الداخلية والخارجية
Tranducers: للمحفزات لتغيرات جهد
Generators :APs in afferent Nerves
Inform : CNS about stimuli in environment
Functional classification of receptors is according to?
Specificity to Stimuli
Receptors are classified according to ?>
1-Specificty
2-Site
3-Adaptations
Mention classfication at Stimulus
MCETN
Mechanoreceptors
Chemoreceptors
Electromagentic receptors
Thermoreceptors
Nociceptors
لو كنت مقيتا للبلايا وما شكرت…. لسكنت في نفس المكان وما تحركت
Classification at site
Intero and extero ceptors
Classification at adapting
Rapidly adapting
Moderately adapting
Slowly tonic adapting
Explain Mechanoreceptors ,
They responds to mechanical
stimuli and vary :
طبق
Touch and pressure
Baroreceptors
Proproiceptors
Cochlear and Vestibular
expain cehmoreceptors
Detect chemical changes :
Respiratory chemoreceptors central and peripheral
Taste and smell chemoreceptors
Explain nociceptors and Electomagneric receptors
noci for tissue damage =pain
Electromagnetic for ligh in red and cones in retina
Show Interoceptors
بتحس باي مثير جوا الجسم نفسه
بفهم من غير ميم
Proprioceptors baroreceptors
Viscerorceptors
Hypothalamic receptors
Gluco,thermo,osmo ceptors
explain the exterocepotrs
detect stimuli on body surface
Cutanuous : p2t2
Pressure Pain
Touch Temperature
Teleceptors:
Visaul
Auditory
Smell receptors
Classify touch receptors according to adaptations
Touch receptor is rapidly adapting receptor rapidly decrease discharge of impulses in afferent nerves despite constant stimulation
Describe pain receptors according to adapation
It is slowly adapting receptors as it contiues discharging impulses to afferent nerves in case of constant stimulation
As Pain receptors
Classify Thermoreceptors according to adaptations
This is moderately adapted receptors
moderate decrease in impulses to afferent nerves in case of constant stimulation
EX: Thermoreceptors-Chemoreceptors as taste and smell receptors