Receptors, Sensation and Pain Flashcards
What are the key receptors?
Mechanoreceptors, chemoreceptors, nociceptors, thermoreceptors, photoreceptors, osmoreceptors and proprioceptors
What are the Mechanoreceptors responsible for?
Detects change in position of the receptor. Stretch, pressure and touch.
What are the chemoreceptors responsible for?
Detects change in concentration of chemicals, Co2 and glucose
What are the nociceptors responsible for?
Detects tissue damage, burns, trauma
What are the thermoreceptors responsible for?
Detects a change in temperature, hot or cold
What are the photoreceptors responsible for?
Detects a change in light, only found in the retina of the eye
What are the osmoreceptors responsible for?
Detects change in osmotic pressure, found in the hypothalamus
What are the proprioceptors responsible for?
They are the sense of orientation or body position, which means you can locate a part of your body without looking at it. Helps maintain posture and balance
What is a sensation?
Conscious awareness of incoming sensory info. This is the result of a stimuli
What is an adaptation?
The decrease in the perception of a nerve impulse even though the stimuli is constant e.g coming into a dark room from being outside. You may start to struggle to see at first but then you start to adapt to the new conditions and can see clearly again
What is somatic pain?
A result of nociceptors activation in the skin, tissue or muscles
What is visceral pain?
As a result of nociceptors activation of the thoracic, pelvic and abdominal oragns
What is referred pain?
Pain felt in a different place to where it has originated
What is phantom pain?
Ongoing pain perceived by the brain to be located in a part of the body that is no longer there e.g amputation
Muscle spindles and tendon organs are examples of what?
proprioceptors
