circadian rhythms Flashcards
1
Q
when does more cell division occur
A
at night because lack of radiation reduces chance of mutation and more energy as at rest .
2
Q
what is the master clock?
A
superchiasmatic nucleus in hypothalamus - keeps everyday time
3
Q
molecular clock
A
transcription-translation feedback loop which drives clock genes
4
Q
when is there a lot of superchiasmatic nucleus activity?
A
day and less/ slowed down at night
5
Q
when is there a risk of heart attack or stroke?
A
morning, as getting up
6
Q
when is best time to eat sugar?
A
morning, blood sugar recovers quickly
7
Q
melatonin
A
production suppressed by blue light
8
Q
where is melatonin synthesised and secreted?
A
pineal gland
9
Q
chronodisruption
A
chronic misalignment of circadian rhythms
10
Q
what risks are increased by chronodisruption?
A
heart disease cancer sleep disorders metabolic changes type 2 diabetes cognitive impairment mental health conditions
