EXCRETION 1

1. Too much carbon dioxide in the body is __________.

• 1. toxic

• important

• necessary

• good for lúng

1. The lungs, liver and _______________are involved in the excretion process.

• 1. kidneys

• heart

• gut

• stomach

1. Lungs excrete carbon dioxide during inhalation.

• TRUE

• FALSE

1. Liver excretes excess water, excess salt, and urea.

• TRUE

• FALSE

1. The liver has no role in excretion.

• TRUE

• FALSE

1. Excretion is the removal of the waste substances of metabolic reactions, toxic materials, and substances in excess of requirements.

• TRUE

• FALSE

1. Urea is toxic to the body in higher concentrations and so must be excreted.

• TRUE

• FALSE

Reducing the activity of enzymes in the body has no effect on metabolic reactions.

• TRUE

• FALSE

1. Carbon dioxide must be excreted as it does not dissolve in water and has no effect on the pH of cells.

• TRUE

• FALSE