Circadian Rhythms Flashcards
(10 cards)
1
Q
What is the master clock
A
suprachiasmatic nucleus
2
Q
What does the SCN determine
A
alertness, arousal
3
Q
Which genes are used in the circadian rhythm?
A
PER1/2/3 CLOCK BMAL CRY1/2
4
Q
name the 4 main types of rhythms
A
ultradian - less than a circadian
circadian - 24h
infradian - more than circadian
circannual - annual cycles
5
Q
Length of a circadian rhythm is…
A
24h -+ 11min
6
Q
Dorsomedial SCN
A
functions under constant darkness
7
Q
ventrolateral SCN
A
function with direct retinal input
can be synchronised to night/day cycle
8
Q
Pineal gland (sleep/wake)
A
produces and releases melatonin
9
Q
melatonin (sleep/wake)
A
mediates info about dark/night
10
Q
Where are melatonin receptors concentrated
A
the SCN
