6.7: Circadian rhythms

Question 1

Identify two endogenous pacemakers (2 marks)

Answer 1

One example of an endogenous pacemaker is the suprachiasmatic nucleus, which is found in the hypothalamus and acts an internal body clock

Question 2

Identify two endogenous pacemakers (2 marks).
One example of an endogenous pacemaker is the suprachiasmatic nucleus, which is found in the hypothalamus and acts an internal body clock.

Another example of an endogenous pacemaker

Answer 2

Another example of an endogenous pacemaker is the pineal gland, which contains light-sensitive cells and helps with the onset of sleep