EXCRETION & HOMEOSTASIS

Excretion is the removal of _____________ waste from the body.

Excretion is the __________ of ___________ __________ from the body.

• expelling, excess gas

• removal, surplus, oxygen

• removal, metabolic, waste

What are two additional purposes of excretion?

• store excess substances and oxygen

• intake of carbon dioxide and water

• rid the body of excess materials and chemical waste

Metabolism is ______________________.

• storing of waste in a living organism

• all the chemical reactions that occur in a living cell

What are metabolic wastes?

• reactants produced from a reaction

• waste substances from a chemical reaction

• reactants that are used in a chemical reaction

Why is defecation/egestion NOT excretion?

• faeces is undigested material that remains after nutrients are removed from food

• faeces remains in the body

• faeces is digested material that is excreted from the body

Faeces is produced by a chemical reaction. T OR F

• T

• F

Define homeostasis.

• Homeostasis is the change that takes place in the body.

• Homeostasis is chemical reactions that take place in the body.

• Homeostasis is maintaining a constant internal environment.

Homeostasis comes from homeo and stasis.

• Homeo means home and stasis means static.

• Homeo means same or similar and stasis means standing still.

• Homeo means different and stasis means moving

Give two examples of internal environments of homeostasis.