Class II

Melatonin, which has a role in maintaining our circadian rhythm, is inhibited by which of the following?
  1. Sexual activity
  2. Alcohol
  3. Light
  4. Darkness
What colour are your eyes if you have comparatively little pigment in your iris?
  1. Blue
  2. Brown
  3. Green
  4. Hazel
What happens to the brain after a night of heavy drinking?
  1. The brain become dehydrated and shrinks away from the skull
  2. The brain swells, causing a splitting headache
  3. The nerve endings in the base of the brain become inflamed
  4. Brain activity increases and the surfeit of thoughts causes a headache
Which parts of the human body contain the ring-like muscles called sphincters?
  1. Anus and urinary tract
  2. Mouth and eye
  3. Stomach
  4. All of the above
In which parts of the body are cells not replaced when they die?
  1. Kidneys
  2. Muscles
  3. Skin
  4. Brain
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