Class II

Humans pass gas that is created by bacteria in the colon as well as swallowing air. What is considered an average number of times to pass gas?
  1. 2-5 times a day
  2. 10-20 per day
  3. 40-50 times per day
  4. 52-65 per day
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
How long is your large intestine?
  1. 6-8 metres
  2. 1.5 metres
  3. The size of a football field
  4. 50 cm
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
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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