Mais les résultats doivent être attendus longtemps et il n'y a généralement pas de temps doxycycline prix L'autre cas, c'est que l'achat d'un ou d'un autre antibiotique dans une pharmacie classique nécessite des dépenses matérielles considérables et pas toutes les personnes ne peuvent acheter des produits pharmaceutiques aussi coûteux.

Chapter 3 excretion

CHAPTER 3 EXCRETION
SUBJECTIVE QUESTIONS
3.1 Human Excretion

1
Complete the table below by stating the method of excretion and excretory materials for the following excretory organ. Excretory organ
Method of excretion Excretory materials
Fill in the blanks with the words given. (a) The process of removing waste products, produced during chemical processes in the cells, is called ___________________. (b) If wastes are not removed, _____________ substances build up and these can damage organs in the body. are _____________ , carbon dioxide, urea and mineral salts. (d) The excretory organs of humans are lungs, _________
3.2 The Urinary System in Humans

3
Tick  the statements below that are true. (a) The kidneys are located at the back of the body and form the main organs of the urinary system. (b) The function of the kidney is to remove water and (c) The kidneys are bean-shaped and roughly the size of a Name the parts of the human urinary system based on the Parts of urinary
Function
system in human
Tube that carries urine from the kidney to the bladder Excretory organ that removes wastes like urea,water and mineral salts from the blood into the urine Tube that carries urine from the bladder for removal Temporary storage for the urine before removal Label the human kidney using the words given. Cortex Ureter Medulla Vein Pelvis of kidney 3.3 Excretion in Plants
6
Underline the correct word in the brackets so that each (a) Plants excrete water, [urea, mineral salts], oxygen,
carbon dioxide and other nitrogenous wastes. (b) Plants excrete their waste products by simple diffusion through the cell [wall, membrane] and through the
stomata.

OBJECTIVE QUESTIONS
3.1 Human Excretion

1
Which of the following excretory products are excreted All the following are excretory organs except
3.2 The Urinary System in Humans

3
Which of the following is not a function of the kidneys?
It regulates the amount of water and mineral salts in the body Diagram 1 shows the cross section of the human kidney. Which part marked P, Q, R and S carries urine from the kidney to the urinary bladder? Which of the following are not true?
Excretory product
Excretory organ

3.3 Excretion in Plants
6
Which of the following excretory products from plants can be Which of the following plants produce latex? REVISION

1
Which of the following excretory product does not match?
Excretory organs
Excretory product
Diagram 1 shows the human urinary system. __________________________________________ (c) Describe what happens to the body when both kidneys __________________________________________ __________________________________________ (d) State how kidney failure can be treated. __________________________________________ __________________________________________ 4 The following information describes the excretion of plants. Some of the excretory products in plants ___________________________________________ ___________________________________________ Name the parts of plants that will eliminate the _______________________________________ ________________________________________

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