4.1.2 Warmup

An environmental cue that can regulate the body's circadian rhythm.

In the presence of light, the release of melatonin is ​ (a)   , whereas in the absence of light, the release of melatonin is ​ (b)   .

• inhibited
• stimulated

The suprachiasmatic nucleus releases melatonin.

• True

• False

Did you do the PLT (Unit 4 KKP 2)?

• YES!

• No... :'(

Biological and behavioural changes that occur in a cycle that lasts less than 24 hours.

Biological processes that coordinate the timing of body activities over a 24-hour period.