Practical Question: Organs of the Human Digestive System.

The diagrams below are illustrations of organs of a biological system in humans. Study it carefully and answer the questions that follow.

1. a)

• Name the biological system
• Name the organs labelled A to F
• Name the parts labelled I to IV

1. b)

• State two observable differences between organs A and E.
• State the substance secreted by each of the organs B, D, E and F

c)

• Which organ is glucose converted to glycogen?
• Explain briefly the conditions under which glucose is converted to glycogen

1. d)

• Which of the labelled organs secretes a hormone?
• Name the hormone secreted by the organ named above

1. e)

• Which of the labelled parts on the organ labelled A is vestigial?

1. f) Name the labelled organ that is associated with the following processes

• Diffusion
• Reabsorption
• Emulsification
• Churning

Expected Answers

a)

i. Digestive system

ii.

A:            large intestine

B:            Liver

C:            Gall bladder

D:            Stomach

E:            Small intestine

F:            Pancreas

iii)

I:             Colon

II:            Rectum

III:           Anus

IV:           Appendix

b)

i) Observable differences between organs A and E.

ii) Substances secreted by the organs

B:            Bile

D:            Gastric juice

E:            Succus entericus

F:            Pancreatic juice

c)

i) B

ii) Glucose absorbed from the ileum is used in tissue respiration to release energy. Excess glucose in the body will be converted into glycogen in the presence of insulin in the liver

d)

i) F

ii) Insulin

e) IV

f) Organ that is associated with the process

i) E; D

ii) A

iii) E; B

iv) D

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