Sensory receptors, taste & smell WK6 L2 Flashcards
WHAT IS SENSATION?
CONSIOUS OR SUBCONCIOUS LEVEL OF AWARENESS OF CHANGES IN ENVIRONMENT
WHERE DOES THE PROCESS OF SENSATION BEGIN?
SENSORY RECEPTORS OF SPECIALISED CELLS OR DENDRITES IN SENSORY NEURON
WHAT EVENTS NEED TO TAE PLACE FOR SENSATION TO OCCUR?
STIMULUS OCCURED IN RECEPTIVE FIELD - SENSORY RECEPTOR CONVERTS STIMULUS TO RECEPTOR POTENTIAL - GRADED POTENTIAL REACHES THRESHOLD AND ACTION POTENTIAL TRIGGERED - INTEGRATION OF SENSORY INPUT TAKES PLACE IN CNS
CAN RECEPTORS DETECT MULTIPLE DIFFRENT TYPES OF STIMULUS?
NO THEY CAN ONLY PROCESS ONE TYPE OF STIMULUS
WHAT INFORMATION DO RECEPTORS SEND?
MODALITY - LOCATION - INTENSITY - DURATION
WHAT IS SENSORY ADAPTATION?
WHEN THE SENORS FIRE OFF AND THE ENVIRONMENT STAYS THE SAME SO THE RECEPTORS SHUT OFF
WHAT ARE TONIC RECEPTORS?
CONSTANT SIGNAL AS LOGN AS STIMULUS IS APPLIED
WHAT ARE PHASIC RECEPTORS?
BURST OF ACTIVITY BUT QUICKLY STOP AFTER FIRING
WHAT ARE CHEMORECPTORS?
CHEMICAL RECEPTORS - TASTE
WHAT ARE THERMORECEPTORS?
TEMPERATURE RECEPTORS
WHAT ARE MECHANORECPTORS?
MECHANICAL CHANGES
WHAT ARE PHOTORECEPTORS?
LIGHT RECEPTORS
WHAT ARE OLFACTIONRECEPTORS?
SMELL RECEPTORS
WHAT ARE NOCICEPTORS?
PAIN RECEPTORS
WHAT ARE INTERORECEPTORS?
INTERNAL RECEPTORS
WHAT ARE EXTERORECEPTORS?
EXTERNAL RECEPTORS
WHAT ARE PROPIORECEPTORS?
BODY POSITIONAL AND MOVEMENT RECEPTORS
WHAT ARE GENERAL SENCES?
WIDELY SPREAD ALL THROUGHOUT BODY
WHAT ARE SPECIAL SENSES?
VISION - HEARING - SMELL - TASTE - BALANCE
WHAT ARE UNENCAPSULATED RECEPTORS?
STRUCTURES OF FREE NERVE ENDINGS
WHAT ARE EXAMPLES OF UNENCAPSULATED RECEPTORS?
NOCICEPTORS - THERMORECEPTORS - TACTILE DISCS - HAIR RECEPTORS
WHAT ARE ENCAPSULATED RECEPTORS?
SPECIAL CAPSULE WHICH ENCLOSES NERVE ENDING
WHAT ARE EXAMPLES OF ENCAPSULATED RECEPTORS?
TACTILE CORPUSCES - KRAUSE END BULB - LAMELLATED CORPUSLES - RUFFINI CORPUSCLES
WHERE ARE NOCIRECEPTORS FOUND?
EVERYWHERE EXCEPT THE BRAIN
WHAT IS PAIN FROM SKIN MUSCLES AND JOINTS CALLED?
SOMATIC PAIN
WHAT IS PAIN FROM THE VISCERA CALLED?
VISCERAL PAIN
WHICH CHEMICALS STIMULATE PAIN FIBRES?
HISTAMINE - BRADYKININ - PROSTAGLANDIN
WHAT IS REFERRED PAIN?
PAIN PATHWAYS FROM SOMATIC PATHWAYS AREAS ARE USED BY THE VISCERAL REGION
HOW DO THE CHEMORECEPTORS GET ACTIVATED?
MOLECULES DISSOLVED IN SALIVA
WHAT ARE THE TYPES OF SENSATIONS ON THE TOUNGUE?
BITTER - SOUR - SWEET - SALTY - UMAMI
HOW DO THE OLFACTIONRECEPTORS GET ACTIVATED?
FROM INHALING GAS INTO NASAL CAVITY
HOW ARE ODOURS PROCESSED?
ODOURS CREATE RECEPTOR POTENTIAL - ACTION POTENTIAL TRAVELS TO BRAIN - RECEPTORS ACT UPON SMELL
