Sensory systems

1st, 2nd and 3rd order neurons relaying information from the periphery to higher centres

According to structure, according to location, according to type of stimulus detected

Free nerve endings, encapsulated nerve endings, separate cells

<p>Exteroreceptors, interoreceptors, proprioceptors</p> Signup and view all the answers

<p>Mechanoreceptors, chemoreceptors, thermoreceptors, osmoreceptors, nociceptors, photoreceptors</p> Signup and view all the answers

<p>When pressed, the lamellae deforms, this presses on the tip of the sensory neuron. This deforms plasma membrane and becomes leaky to the sodium ions. Depolarises the membrane at site of deformation</p> Signup and view all the answers

<p>Receptors that adapt quickly, will only inform CNS about immediate environmental/internal changes</p> Signup and view all the answers

<p>Receptors that adapt slowly and continuously inform CNS of environmental/internal changes (e.g. muscle spindles)</p> Signup and view all the answers

<p>An area in which stimulation leads to response of a particular sensory neuron</p> Signup and view all the answers

<p>1st order neuron relays info from sensory receptors to spinal cord/brainstem, 2nd order neurons conduct impulses from sc/bs to thalamus (VPLN), 3rd order neuron conduct impulses from the thalamus to the sensory cortex</p> Signup and view all the answers

<p>Pain, thermal, tickle, itch, crude touch, pressure</p> Signup and view all the answers

<p>Free nerve ending</p> Signup and view all the answers

<p>Lateral</p> Signup and view all the answers

The process of relaying sensory information from the body to the brain.

Sensory receptors are classified based on their structure, location, or the type of stimulus they detect.

These receptors have a simple structure with no specialized covering around the nerve ending.

These receptors have a more complex structure with a covering around the nerve ending.

These receptors are separate from the nerve endings and transmit signals via synapses.

These receptors detect stimuli from the external environment.

These receptors detect stimuli from within the body, like organs.

These receptors detect stimuli related to body position and movement.

These receptors detect mechanical pressure, touch, and vibration.

These receptors detect chemical changes, like taste and smell.

These receptors detect temperature changes, like hot or cold.

These receptors detect changes in pressure, like osmotic pressure.

These receptors detect pain from damage or potential damage to tissues.