Sensory Receptors

What are the 6 types of sensory receptors?

A group of sensory receptors grouped together in a way to maximise the reception of a stimulus is called a:

What are the basic features of a sense organ?

Which four aspects of a stimuli will a sense organ code for?

A sensory receptor will code for four aspects of a stimulus: [blank_start]Intensity -[blank_end] The receptors send info in different patterns to inform the brain of the intensity of the stimulus [blank_start]Duration -[blank_end] determined by the firing sequences of the receptors [blank_start]Location -[blank_end] Often determined by the location of the receptor in the body - eg. sound receptors in the ear [blank_start]Type (Modality) -[blank_end] Only specific receptors will respond to specific stimuli

[blank_start]Proprioceptors -[blank_end] Main internal sense receptors in the body [blank_start]Chemoreceptors -[blank_end] Responsible for taste and homeostasis [blank_start]Mechanoreceptors[blank_end] - Responsible for mechanical forces [blank_start]Photoreceptors -[blank_end] Responsible for sight [blank_start]Nociceptors -[blank_end] Cause pain to protect the body from harm [blank_start]Thermoreceptors -[blank_end] Detects change in heat

[blank_start]Proprioceptors[blank_end] - Found throughout body [blank_start]Nociceptors[blank_end] - Found on skin and organs [blank_start]Mechanoreceptors[blank_end] - Found in skin cells [blank_start]Chemoreceptors[blank_end] - Found in tongue and back of nose

What are the 5 flavours that direct chemoreceptors can sense?

The two types of chemoreceptors are: 1. [blank_start]Distance[blank_end] Chemoreceptors - Found at the back of the nasal cavity and respond to chemical molecules carried in the air. Do not need to be in contact with the source of stimulus to detect it. 2. [blank_start]Direct[blank_end] Chemoreceptors - Do come in contact with the source of the stimulus and are found in groups on the tongue, palate, and throat (taste buds). Taste buds are little swellings of skin called papillae and each group can detect a different quality.

Photoreceptors transform [blank_start]light[blank_end] energy into [blank_start]action[blank_end] potential and then interpreted in the brain as [blank_start]visual[blank_end] images. [blank_start]Cone[blank_end] cells are sensitive to colour - they provide clear and accurate distinctions between objects. [blank_start]Rod[blank_end] cells are sensitive to light rather than colour. Distinguish between sizes and shapes.

3 types of mechanoreceptors: 1. [blank_start]Slowly adapting types[blank_end] may have either a small or large receptive field. a. [blank_start]Small receptive field[blank_end] detect form and roughness b. [blank_start]Large receptive field[blank_end] detect stretching. 1. [blank_start]Rapidly adapting receptors[blank_end] have a small field and perceive slipping 2. [blank_start]Pacinian receptors[blank_end] detect high frequency vibrations

The two types of thermoreceptors in mammals: Those that detect [blank_start]increase[blank_end] in temperature Those that detect [blank_start]decrease[blank_end] in temperature

Nociceptors respond to damaging stimuli by sending [blank_start]signals[blank_end] to the spinal cord and brain that result in the perception of [blank_start]pain.[blank_end] - Found in the [blank_start]skin[blank_end] and organs - Only respond to a potentially [blank_start]damaging[blank_end] situation or to actual damage, and their activation threshold is high. - Respond to a variety of [blank_start]stimuli[blank_end]: - Extreme [blank_start]temps[blank_end] - Excessive [blank_start]pressure[blank_end] or distortion - Wide variety of [blank_start]chemicals[blank_end]