PSYCH Circadian & Ultradian rhythms

Question 1

2 cat of bio ryhtmes:

Answer 1

circadian and ultradian rythms

Question 1

BIOLOGICAL RYTHEMS

Answer 1

• keeps us alive -body temp, hunger, BP
  -cycle, operates naturally n is controlled by a bio clock

Question 2

Circadian rhythms

Answer 2

a biological rhythm involving physiological, or behavioural changes that occur as part of a cycle with a duration of about 24 hours

Question 3

Circadian rhythms

One example is the human sleep-wake cycle.

Answer 3

The time we spend asleep and the time we spend awake.

• largely endogenous - originates within us/controlled by internal mechanisms
• there are zeitgebers

Question 4

zeitgebers:

Answer 4

environmenta time cues which can inlfence our sleep wake cycle like sunlight, artificial light, clocks, body temp

Question 5

ultradian rythms

Answer 5

bio rythm involvin physiological, psycholoigcal or behav changes that occur as part of a cycle shorter than 24 hrs

Question 6

Suprachiasmatic nucleus (SCN)

Answer 6

suprachiasmatic nucleus (SCN) regulates our sleep-wake cycle in brain

located within our hypothalamus.

Question 7

Suprachiasmatic nucleus (SCN) [2]

Answer 7

regulates our sleep-wake cycle by controlling the activity of our pineal gland - produces the hormone melatonin

Question 8

SCN LIGHT

Answer 8

receives light from our env. Depending on how much light is received, the SCN then signals our pineal gland to either secrete more or less melatonin.
The more light, the less melatonin