Excretion questions | form three Biology

Mention two functions of the skin.

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UNSOLVED

Distinguish between excretion and osmoregulation.

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UNSOLVED

Study the diagram below (Figure 3) which shows a part of the human uriniferous tubule then answer the questions that follow.

1. (i) Name the parts labelled A, B, C and D.
   (ii) What IS the name given to the fluid labelled C?
   (iii) Name two (2) components of blood that will not diffuse into the part labelled C.
   (iv) Name a nitrogenous waste which is present in urine but absent in the part labelled B.
2. List the processes involved in urine formation.

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UNSOLVED

Urine is a waste product of metabolism , which is very important physiological process taking place in the human body. Discuss the mechanism of urine formation.

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UNSOLVED

Useful substances are retained in the kidney by
A Filtration
B Osmosis
C Selective reabsorption
D Osmo-regulation
E Diffusion

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UNSOLVED