A. Vein
B. Artery
C. Capillary
D. Aorta

A. Decreases
B. Increases
C. Does not change
D. First decrease, then increase

A. Eyes
B. Heart
C. Brain
D. Lungs

A. Fats and sugar
B. Fats, sugar and protein
C. Starch, sugar and proteins
D. Starch and sugar

A. it is useful in the metabolism
B. It is useful in digestion
C. It gives energy
D. It is useful in growth

A. They have very efficient grinding teeth
B. They possess an enlarged section of the gut containing bacterial which break the cellulose for them
C. They produce the enzyme cellulase which digests the cellulose; human beings do not make this enzyme
D. Human beings do not need to digest cellulose

A. 40°C
B. 60°C
C. 80°C
D. 100°C

A. Palms and soles
B. Stomach and mouth surface
C. Head
D. Lips and glans penis

A. 72-80 times a minute
B. 20-30 times a minute
C. 40-50 times a minute
D. 16-20 times a minute

A. Axons
B. Neurons
C. Dendrites
D. Schwann cells