Exogenous Zeitgebers - BIOPSYCHOLOGY Flashcards
what type of stimuli for biological rhythms are exogenous zeitgebers
external (external stimuli from the environment that influence cycles/rhythms)
what are ‘rods’ and ‘cones’
the black and white (rods) and red, green and blue (cones) we see
what do rods and cones use to detect light
chemicals called opsins
what’s the third photoreceptor cell called
IPRGCs (intrinsically photoreceptive retinal ganglion cells)
what do IPRGCs contain
melanopsin
what is melanopsin
a non-visual opsin used to detect intensity or wavelength of light
how is the level of light detected
by the ganglion cells’ melanopsin reaching the SCN (through the optic nerve)
other than light, what is the most powerful exogeneous zeitgeber
social cues
examples of environmental stimuli we use to set our external rhythms
radio/tv programmes
behavioural routines
regular working patterns
meal times
