lecture 6

Question 1

chronobiology

Answer 1

studying biological time cycles
concerned with rhythms

Question 2

ultradian rhythms

Answer 2

less than 24 hours
e.g. appetite and cortisol (Pulse)

Question 3

circadian rhythms

Answer 3

24 hours
e.g. cortisol levels (controlling sleep, lowest at night to make sleep easier, higher in the morning so a bitch will wake)
disruptions induce problems like IBS and obesity

Question 4

infradian rhythms

Answer 4

more than 24 hours
e.g. menstrual cycle

Question 5

superchiasmatic nucleus

Answer 5

keeps time based on light signals from the retina
every cell in the body has a clock to control metabolism

Question 6

molecular clock

Answer 6

controlled by light
chemical signals (melatonin, blue light inhibits melatonin release)