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How well do you know your body?
Take our quiz to test your knowledge of human anatomy.
1) How many bones make up your axial skeleton?
20

30

80

120

2) Which muscles straighten your wrist and fingers?
Extensors

Flexors

Biceps

Mitochondria

3) Which of the following body cells cannot divide once mature and cannot be replaced if badly damaged?
epithelial cells

osteocytes

neurons

erythrocytes

4) The role of nociceptors is
relaying nerve impulses to the brain and interpreting them as sounds

detecting intense heat or pressure

helping maintain normal blood compression

disabling pathogens and marking them for reabsorption

5) Which of the following substances is not one of the four bases found in human DNA?
Adenine

Cytosine

Pyridoxine

Thymine

6) At which age are a person's fontanelles replaced by bone?
12-18 months

4-5 years

10-12 years

18-21 years

7) Why do men have lower pitched voices than women? Are their vocal cords
Longer and thicker?

Longer and thinner?

Shorter and thicker?

Shorter and thinner?

8) What is the hardest substance in the body?
Glucose

Calcium Phosphate

Myelin

Iron

9) What is the name of the membrane that covers the surface of bones?
Epithelium

Sebum

Periosteum

Glycogen

10) Which system is comprised by the organs of balance?
Vestibular

Endocrine

Olfactory

Limbic
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